The (psychological) dynamic is simple: The "good" people care about their surroundings and what they are involved with, and even their own reputations. So, when a bunch of abusers/scammers move in they think to themselves... "I'm not sure I want to be part of this anymore" and leave. The "bad" people only see an opportunity to be exploited and care not about other users, nor about the survivability of the venue, so they stay. In time, the entire landscape changes...
I wish it were not so, @glory7, I truly do.
The (psychological) dynamic is simple: The "good" people care about their surroundings and what they are involved with, and even their own reputations. So, when a bunch of abusers/scammers move in they think to themselves... "I'm not sure I want to be part of this anymore" and leave. The "bad" people only see an opportunity to be exploited and care not about other users, nor about the survivability of the venue, so they stay. In time, the entire landscape changes...