I don't know which faggot in the group chat posted the chat but he deserves to get his ass kicked.

Could have been a friend or girlfriend, too. There have been instances where someone takes a picture over someone's shoulder, or something, and posts that. That's what happened to Lucas Gerhard when some bitch snapped a picture of a private chat and tried to railroad him as an actual terrorist.

But, yeah, if it was one of the people in the chat, unless there were legitimate rape threats, that's a real dick move. And even if there were, it still kind of is. If you think it's an issue big enough to scare you...go to the police. "Hey, I know a dude, and I think actually intends to rape a girl."