Yeah, because there's very little oversight on Wikipedia and just anyone can edit any page from an anonymous IP address without getting reverted in five minutes flat.
Seriously, there's no army of anonymous trolls out on the Internet capable of a sustained edit campaign on a single page that just about manages to stay within Wikipedia's rules. It's editors and their sock puppets.
More generally, I'm getting tired of people acting like anonymous trolls are a completely separate set of people from normal members of the community. Like it or not, they're the same people. We don't log onto a different account and suddenly become a 14-year-old boy that's scared of girls, we channel our inner 14-year-old boy. Sooner we accept that, sooner we can grow up.