Why use the warn button?

[qwertysaur]

So wait, the warn button doesn't send a lightning bolt through the internet that shocks the warned person?

OH MY GOD NOW I KNOW EXACTLY WHAT TO IMAGINE EVERY TIME SOME INTERNET MORON PISSES ME OFF

THANK YOU

SO MUCH <3

Zappy zap zap!

Also on topic:
I warn things like double posts and old threads in the FF forums. Also if I find something that I find really offensive I warn it.