As it is, we have to moderate *edits* by new users, so it seams reasonable as a stop-spam mechanism to require all **external** links from <50 rep users moderated.

A lot of the spam I see works like this: 

1. User joins
2. User searches for all relevant posts.
3. User pastes links to their product.

And 99% of the time, its the same bad link. 

Once we get the spammer, they come back with a different name, and repeat from #1 with the same link. 

However, if either links themselves required moderation to be posted, or all articles by new users with <50 rep with edits were automatically put into the moderation queue ( so they wouldn't appear till approved ) it would limit the amount of user-visible link-spam. 

Even a nicer thing to have would be heurisitics on the users links, ie: 

1. **This link has appeared more than once in the last $period**
2. **This user has pasted >1 external link in the last $period**
3. **This user has pasted this link >1 times in the last $period**

etc, to quickly put a gag on spammers.