The friend should do it.
Do you know what it's like to lose a friend to Self Delete? No? Then shut the forget up.
Do you know what it's like to tell a sarcastic joke? No? Then shut the forget up.
It doesn't matter, Self Delete is not a joking matter. How would you feel if one of your friends committed Self Delete?
Let him screw himself
What guy is going to kill himself because of a terrible reason? It's possible to have bad days at school/internet, but you can easily overcome it.