user4484: I edited this question's title (Death Note spoiler) to avoid spoilers. Later on, it was rolled back. Should I not have edited it then?
I'm not quite sure that the title is needed to contain such spoiler. The fact that it is tagged as Death Note seems sufficient to suggest who is meant by 'shinigami' and 'character'. Besides you can always type the real question in the post. This can still be searchable in google afaik.
So if the question is

Why did John kill Jane?

, then why not have the title be something that censors (at least 1 of) the names like

Why did X kill Y?

and then just say the real question in the post.
If this title isn't informative enough, then perhaps we can say the episode title/chapter or the season or volume. Eg

Why did X kill Y in S02E04 ?

or (in case that would be a spoiler)

Why did X kill Y in this season 2 episode ?

I happen to know in other sites like reddit or myanimelist, it is extremely forbidden to put a spoiler in the title. This isn't just for anime but other for other fiction subreddits/forums and even for, like, sports or gaming subreddits/forums.
'A good title is always more important then avoiding spoilers' would be completely nonsensical there. They even go a step further to say you should say what kind of spoiler you're hiding eg season X spoiler, manga spoiler, spoiler for another show, etc
Or maybe this is a stackexchange thing...What do movies se or scifi se do? Do they spoil people too?

user1908: I don't really agree with the other answer.
I strongly advocate for avoiding spoilers in titles except when they are really, genuinely, 100% necessary for the post to make any sense. Keep in mind that when you google for an answer to some anime-related question, google indexes both the title and the body of the post, so stuff is still findable even if you're somewhat roundabout in the title. While I imagine the title is granted more weight, avoiding spoilers in the title still likely does little harm. I think that the benefit of avoiding spoiling users' experience with various shows outweighs the cost of losing some descriptiveness in the titles.
I also want to point out that while the claim "the ignore tag feature will allow users to ignore any tags in a series they wish to avoid spoilers about", is technically correct, it does not propose a practically useful course of action. Here's why:
Suppose that I'm Joe Blow, some dude who's only seen Naruto. One day, I come to Anime.SE and ask some questions about a Ninetales Uchiha Hokage Rasengan. While I'm here, I see some questions on the front page about this thing called "Death Note". That sounds like a pretty metal sort of thing, so I figure I'm going to go and watch that when I get a chance. But! As I'm browsing the front page, I see another question title that reads "Why did Rem kill L?" that's tagged with [death-note]. And then I watch the first few episodes of Death Note, and suddenly the context of that question becomes clear - I know who Rem is, I know who L is, and now I've been spoiled on the fact that Rem is going to kill L at some point!
There's the problem - users cannot, practically speaking, ignore tags for all shows they may want to watch in the future. If you know in advance that you want to avoid spoilers for X, sure, ignore [X]. But if you don't, what can you do to avoid spoilers? If the spoilers are right there in the titles, there's effectively nothing you can do. And that's the problem with putting big spoilers in titles. 

user1458: The general consensus for questions is that you do not have to avoid spoilers.
As for the title, it just as stated in the post you linked.

The rule I've always followed is to include spoilers in your title only if it's required for the title to be searchable, and clearly indicate what the question is about. In other words, if you can make a good title without spoilers, do so; otherwise include spoilers. A good title is more important than spoilers. After all, the ignore tag feature will allow users to ignore any tags in a series they wish to avoid spoilers about.

I am not to sure how you see your replacement with Shinigami And Character as:

Why did the Shinigami Kill the character? would not make for a very good title
Why did Shinigami Kill L Which shinigami are we talking about? 
Why did Rem Kill him? killed whom?

All with all, in this case including the spoiler makes for the best title, and also would most likely be the one most searched for when looking for a answer to such a question
A good title is always more important then avoiding spoilers

4484: <p>I edited this question's title <a href="https://anime.stackexchange.com/questions/19123">(Death Note spoiler)</a> to avoid spoilers. Later on, it was rolled back. Should I not have edited it then?</p>
<p>I'm not quite sure that the title is <a href="https://anime.meta.stackexchange.com/a/47/4484">needed</a> to contain such spoiler. The fact that it is tagged as Death Note seems sufficient to suggest who is meant by 'shinigami' and 'character'. Besides you can always type the real question in the post. This can still be searchable in google afaik.</p>
<p>So if the question is</p>
<blockquote>
<p>Why did John kill Jane?</p>
</blockquote>
<p>, then why not have the title be something that censors (at least 1 of) the names like</p>
<blockquote>
<p>Why did X kill Y?</p>
</blockquote>
<p>and then just say the real question in the post.</p>
<p>If this title isn't informative enough, then perhaps we can say the episode title/chapter or the season or volume. Eg</p>
<blockquote>
<p>Why did X kill Y in S02E04 ?</p>
</blockquote>
<p>or (in case that would be a spoiler)</p>
<blockquote>
<p>Why did X kill Y in this season 2 episode ?</p>
</blockquote>
<p>I happen to know in other sites like reddit or myanimelist, it is extremely forbidden to put a spoiler in the title. This isn't just for anime but other for other fiction subreddits/forums and even for, like, sports or gaming subreddits/forums.</p>
<p>'A good title is always more important then avoiding spoilers' would be completely nonsensical there. They even go a step further to say you should say what kind of spoiler you're hiding eg season X spoiler, manga spoiler, spoiler for another show, etc</p>
<p>Or maybe this is a stackexchange thing...What do movies se or scifi se do? Do they spoil people too?</p>
 1908: <p>I don't really agree with the <a href="https://anime.meta.stackexchange.com/a/2655/1908">other answer</a>.</p>

<p>I strongly advocate for avoiding spoilers in titles except when they are really, genuinely, 100% necessary for the post to make any sense. Keep in mind that when you google for an answer to some anime-related question, google indexes both the title <em>and</em> the body of the post, so stuff is still findable even if you're somewhat roundabout in the title. While I imagine the title is granted more weight, avoiding spoilers in the title still likely does little harm. I think that the benefit of avoiding spoiling users' experience with various shows outweighs the cost of losing some descriptiveness in the titles.</p>

<p>I also want to point out that while the claim "the ignore tag feature will allow users to ignore any tags in a series they wish to avoid spoilers about", is <em>technically</em> correct, it does not propose a <em>practically</em> useful course of action. Here's why:</p>

<p>Suppose that I'm Joe Blow, some dude who's only seen Naruto. One day, I come to Anime.SE and ask some questions about a Ninetales Uchiha Hokage Rasengan. While I'm here, I see some questions on the front page about this thing called "Death Note". That sounds like a pretty metal sort of thing, so I figure I'm going to go and watch that when I get a chance. But! As I'm browsing the front page, I see another question title that reads "Why did Rem kill L?" that's tagged with [death-note]. And then I watch the first few episodes of Death Note, and suddenly the context of that question becomes clear - I know who Rem is, I know who L is, and now I've been spoiled on the fact that Rem is going to kill L at some point!</p>

<p>There's the problem - users cannot, practically speaking, ignore tags for all shows they may want to watch in the future. If you <em>know</em> in advance that you want to avoid spoilers for X, sure, ignore [X]. But if you don't, what can you do to avoid spoilers? If the spoilers are right there in the titles, there's effectively nothing you can do. And that's the problem with putting big spoilers in titles. </p>
 1458: <p><strong>The general consensus for questions is that you do not have to avoid spoilers.</strong></p>

<p>As for the title, it just as stated in <a href="https://anime.meta.stackexchange.com/a/47/1458">the post you linked</a>.</p>

<blockquote>
  <p>The rule I've always followed is to include spoilers in your title only if it's required for the title to be searchable, and clearly indicate what the question is about. In other words, if you can make a good title without spoilers, do so; otherwise include spoilers. A good title is more important than spoilers. <strong>After all, the ignore tag feature will allow users to ignore any tags in a series they wish to avoid spoilers about</strong>.</p>
</blockquote>

<p>I am not to sure how you see your replacement with <code>Shinigami</code> And <code>Character</code> as:</p>

<ul>
<li><code>Why did the Shinigami Kill the character?</code> would not make for a very good title</li>
<li><code>Why did Shinigami Kill L</code> Which shinigami are we talking about? </li>
<li><code>Why did Rem Kill him?</code> killed whom?</li>
</ul>

<p>All with all, in this case including the spoiler makes for the best title, and also would most likely be the one most searched for when looking for a answer to such a question</p>

<h2>A good title is always more important then avoiding spoilers</h2>
