[quote name='Kain Vincent']What would stop the spammers from posting their spam in another thread?[/QUOTE]
Well it wouldn't be as bad as those times when a new account would start several threads that would flood the front page. There was the one week awhile ago where it happened liked two or three times. But of course its just an idea, it can't block spammers all together but will at least hinder their bs.
TSD brings up a good point too. wlau comes to mind, he barely posts but when he does its always awesome deals. Maybe factor in how long they've been a member somehow? I don't know. The Mod thing is a good idea. The number of posts before starting your own thread shouldn't be a high number though, something reasonable. That way they've interacted in the community somewhat at least.