I recently learned that several of the questions I've been investigating and answering apparently don't meet the SO criteria and are subject to being closed and deleted. (I recently lost 10% of my 800 rep as a result of one of these deletes, as described in [Is the title considered part of the question?](https://meta.stackexchange.com/questions/185842/is-the-title-considered-part-of-the-question).)

When I see new questions come in like that, I can avoid answering them, but I'd like to help others avoid wasting their time as well. As a <3k user, my options seem to be:

* Do nothing
* Make a comment on the question about the way in which the criteria are not met
* Flag the question

Are there any guidelines for how to handle this?

On a related point, one of the reasons put forward for the delete of the question I recently answered was that it was a DRY question and those belong on Code Review not SO. When I went through the "close" selections though (using one my own questions so that I could see the options), I couldn't find a category that "worked" for that. None of the off-topic details matched, nor did any of the high-level categories. Since there are hundreds of DRY question on the SO site and more coming in daily, what reason can I give when flagging one of these DRY questions as inappropriate, particularly since there's a `dry` tag?