It would actually be more reassuring if all of these people were just shitty people who were shitty all the time. Unfortunately, it's not the case. A lot of these people will be decent, upstanding citizens, who wouldn't say boo to a goose in their real lives. However, the anonymity makes them think they can do whatever they want and get away with it.
Pretty much no one is shitty all the time to everyone. I never claimed they are. Idk why is that your response to what I said.
Abusers are usually "nice guys" to people other than their victims. Serial killers some of you mentioned are often perceived as "nice guys". These guys saying fucked up shit in cam model's room are "regular" guys, can be your friends, family members, collegues and otherwise "decent, upstanding citizens".
Is anonimity making it easier? Sure, but that's not the only thing that
makes them think they can do whatever they want and get away with it.
A lot of it is about (real or perceived) power dynamics. A lot of them act the same in person, I promise you, I've met them. Of course, as you yourself noticed, they don't act like that in front of everyone, but if they perceive you as lower in social hierarchy than them, as someone who they can treat like shit without any consequences they will show their true colors.