what if someone says that they are depressed and gonna end their life and we are all gonna be like "haha funny meme" and the next day a dude is found dead in his apartment
i'm pretty sure some ot'ers would be jerks enough to continue the "haha funny dead meme".
however, i tend to not post those "haha funny dead memes" but rather try to talk to the user and see what i can do for him/her about his/her problem.
If you don't want it to happen just assume it is real and offer help to them.
I mean even if they do end up doing it atleast you can say you did more than most of us.