Actually, S2srea, this site has always had the trolls.
I think Matthew leaves them on up to a certain point because they stimulate discussion. The most infamous example is roscoe, a troll with diplomatic immunity, the James Bond of CathInfo with a license to troll.
Then there is the guy who calls himself Pope Augustine or the Great Monarch. Believe it or not, he plays a game with me in particular. I believe he wants me to come off as paranoid. So he takes on various characters and blends in. I am 99.9% sure that Matto, who was here a while ago, was Augustine, and I'm about 85% sure with curiouscatholic.
I have decided that unless he says something against the faith, I'll just leave it alone, since it's not harming anyone until the mockery is overt. Of course this defeats the whole purpose, because mockery is what he's here for. Feed a cold, starve a fever. He can't win; if he descends into open mockery, he'll be discovered; if he just blends in, there's no point.
But as Matthew knows, this guy is not just playing a harmless joke, he once posted an explicit drawing of a naked woman. That's the sort of thing that could get someone to commit a mortal sin. Then, if I'm not mistaken, he tried to erase it, after I had said something, so that I'd look like a lunatic who was seeing explicit pictures of naked women when there were none. I don't remember precisely if he did that but I have a vague memory of it; Matthew might remember better.
This kind of hounding that I've always dealt with on this forum led me to get so paranoid that, if you remember Ladislaus, I began to believe him that Matthew and Caminus were the same person and that Matthew had a split personality. There is an object lesson in what paranoia can do.
Yes, I think Matthew could and should be more anti-troll. But the site has a tendency to slow down without them, that is the problem. If there were more solid members I'm pretty sure he'd crack down harder on trolls.