I agree with the guy that said Josh has a bad case of paranoia.
People like this are funny because all they want to do is complain and not actually do anything. If the Greeks all vanished tomorrow, he'd find some other "elitist" group to bitch about.
Ignore him. There's always going to be people like this at big schools.
On the other hand, leaving a bag of dog poop on his steps would be funny.