His final posts can be read on http://www.reddit.com/r/MensRights/comments/qoixk/a_lot_of_trolls_tonight/
Looking through it I get the sense that people were trying to reach out and tried to persuade him from killing himself. TFA makes it sound as though everyone was cheering him on. Those few who trolled got severely downvoted.
I can't see how reddit nor its users are in any way responsible for his death. Rather seems like his family is out to find a scapegoat. Where were they when he needed help and support?
That's just about the ass-hattiest name I've ever heard. Was half expecting to see the yes men mentioned in the wikipedia article, but they seem to be for real. Sometimes truth really is stranger than fiction.