I was going to say that here. That could be reason for jailtime as far as i'm concerned; I have two friends with serious mental illnesses (developed around 18 using recreational drugs); if you would 'prank' them you would endanger them and people around them. It's a nasty thing.

And some people don't just care. Look at some of the "pranks"(aka "social experiments") on youtube these days. Makes you wonder what type of things are going through the minds of these so called pranksters.

Definitely. My family is big on jokes and and pranks. But the right spirit is "let's have fun together". Without that, I think it is just abuse.

Maybe, but is that going to stop fourchan?