Just tell him enough is enough dude your not proving anything to anybody you look like a fool and your dangerously missusing gym equipment keep it up and your getting 86'd.
The actual problem comes down to pretty much every community owned gym issue.. They hire female or timid males to work the gym. So they really don't enforce rules because they are too scared and uncomfortable to do so.. I've seen people bring in tripods to film themselves when filming/picutres is against policy, I've seen people work out in barefeet (against policy), I've seen the same people over and over walk away and leave bars with weights on them (against policy) etc.. and the staff literally pretend they see nothing so they don't have to enforce policy.
Funny thing, the ONLY people I've ever seen leave weights out or plates on bars at his gym is middle aged women... Actually one is about 50 years old, in great shape, but always leaves her shit out lol...