Its not so much having friends to vet them.

its meeting new people that seem, for all intents and purposes, cool and mellow people.

Then you make the mistake of sending them an off-platform friend request and are quickly brought to realization that the only thing keeping them cool and mellow was the platforms rules and reporting.

I got duped like that once in a game, Kept running into eachother and playing together, so sent them an out of game friend request.. Immediately received a massive tirade about what they really thought about trans people, and gays, and other various topics. 100% unprompted, and out of the blue 0-100 in .00237 second.

The only reason I didnt immediately block them was because I was too stupified and took me a solid minute to gather myself. Ended up having to block them in game, too.. Which I think resulted in them being banned, since they sent me a huge message in game about i must be one of those liberal trans homosexuals since i blocked him after his "truth" or whatever bullshit. Reported his ass, and never saw him again.

Crazy is super good at concealing itself, until it thinks you are a compatriot.