Regardless of whether this ends up being fake or not, as it apparently may be, its interesting to see the conversation about how to correctly respond to this incident. I admit that my first thought was that these people should absolutely have their information released to the authorities for what they did but after having read some of the posts on here and thinking about it more I confess that I've changed my mind.
It's awful that these people were this callous because, I'm sorry, there is no good reason to egg someone on to kill themselves. If you think that they're being an attention whore and aren't serious then fine, ignore them, you won't do any actual harm by saying nothing but you can absolutely do harm by being cruel if they happen to be serious in their claims. Suicide is not always the result of being "weak", sometimes it's a physiological problem and thus no different than any other sickness. I would add though that even if the reason for suicide was purely psychological in nature I think it's pretty fucking awful for people to be so cavalier about somebody else's pain. Having said all of that though, these users haven't committed a crime they've just been really despicable people.
You can't sue them because they haven't done anything illegal. Even though I know this won't happen, it would be great if this story caused people to stop and think about the consequences of their callousness instead of acting in such a way that would get them fucking curb stomped in real life or at least fired from almost any workplace.