Having run a platform of a million or so of those, this is somewhat true. But there were spammers posting across many communities and those where the mods left

Having run a platform of a million or so of those, this is somewhat true. But there were spammers posting across many communities and those where the mods left got littered. We had to set forums to automatically move to require moderator approval to post which at least saved the board in history, but was a pain for a moderator if they returned.