When someone in a forum, newsgroup, etc. says they are leaving (sometimes "and never coming back"), but actually wants to see how people react to their leaving. Usually as the result of drama
joejoe monkey: I can't take this anymore. I'm leaving the forum. I'm tired of being harassed and the mods won't do anything about it.
kikiquan: Internet suicide. He logged on under a different name with the same ISP
The act of intentionally getting yourself banned from a website or forum.
Man, you can't go around posting the f-word everywhere, that's internet suicide!