It's not a wide-spread problem; that is to say that there isn't really anything wrong with the software or the community moderation that misleads users to make these rare, occasional gaffs.
In general, I would prefer to see these types of minor correction be made through the "normal" means (comments, voting, teach by example, etc) rather than adding yet another function/link/menu to the system. Moderators can handle the occasional "human exception."
There are probably 100's to 1000's of these little behaviors where somebody doesn't quite do something correctly. If you add a function or a faq entry to explicitly handle every eventuality that can occur, this place would quickly become an unholy mess.
I vote to leave it the way it is. If it's that bad, flag a moderator. Otherwise, leave a comment describing the "problem" for those that follow.
I prefer to leave the human element in tact.