I don't see the internet as the best place to get help for personal issues (complaining on a forum for body builders? Come on now). I'm sure there was a hot line he could of called. Honestly i see suicide as the most selfish thing a person can do. It shows that all that person cares about is his/herself.
I wouldn't have egged him on (personally i think that is a really stupid question to ask), but there are so many people who keeps calling wolf, eventually you just ignore them. I bet if you go back into the other threads or his pms you will find people who gave him advice to seek help. He chose not too and end his life, am i supposed to feel sorry for him all because life is hard and he couldn't handle it?
The internet is not a nice place at all. There are no rules and it brings out the worst side of people as they don't have to face someone and the consequences of their actions in most case. The people who egged him on are sick and hope they feel guilty for what they did. However spend some time on any of the chans websites and you will get an eye opener on how many assholes there is on the internet.