This has kind of been suggested before, but the problem is that these knuckleheads do not read things.  They won't read any message or understand it upon registration, or they just don't care.  The reason why these shitposters keep posting new threads about merit and keep posting in existing merit threads is because that's where they see merits being given out.  But their posts are still god-awful and just because they're now magically in Meta doesn't make them any more merit worthy.

Still, what you've suggested is not a bad idea.  It would then allow mods to delete any new shit-threads that keep asking the same questions over and over, because then they could point the person to the link that has the answer.  I'm just not sure Theymos wants to do something like that.