Because it's a more "niche" site, people are more willing to turn a blind eye. A lot of people here also shift identities. People also get away with things easier — so as long as they have a new name and a new "face", they get away with it, and can avoid their victims finding them and calling out their bullshit. Er, at least that's My perspective on why there are so many groomers. That, and no one takes it seriously.