Chatroom is a 2010 British thriller film directed by Hideo Nakata about five teenagers who meet on the internet and encourage each other's bad behaviour. The film is based on the play Chatroom by Enda Walsh.
"Talhotblond" (2012). Thomas Montgomery, a married father of two young daughters, gets seduced by the world of online gambling and chat rooms where a virtual romance and sexual obsession lead to big trouble. This film is based on a true story. It's a real Internet thriller. I just wish they would have gotten a better actor to play the wife. Oh, well. I still think it's worth watching if you like thrillers (I do).