It's just the fact of making pointless posts and necrobumping so he can sell in the Classifieds, and with all the scams going around right now people are wary.Um... if you search his post history it's just a series of emoticons in different threads, mostly just hands throwing the horns, fire emoticons, and other "approving" posts like that.
Doesn't seem like the guy is bringing any negativity to the place. What's your problem with him, specifically?