You seriously don't think being a part of a community like that and having people cheering you on can motivate someone to actually go through with something like this?
I think having the thought to do it and being provided the means to carry it in the first place are more pressing issues. I think there are many people that are part of that community that also post on neogaf or, in general, plenty of them that don't support his actions. I'm sure in that very thread there were lots of people telling him not to go through with it.