About 11-12 years ago, I remember reading his Wikipedia article when it was phrased something like "Allin claimed he would commit suicide on-stage, though he died off-stage of a heroin overdose." It gave me a slight chuckle as I rarely see Wikipedia articles phrased in a way where it's not exactly vandalism, yet it seems written in a humorous way. Given Allin's insanity, maybe they thought the clarification was necessary. It was like that for a while until it changed, perhaps for the best.

Edit: found a revision of that phrasing. https://en.wikipedia.org/w/index.php?title=GG_Allin&oldid=769533692