The other thing to do is to wait to pop him when you DO flop a hand. Wait until the river and let him take the lead expecting that you'll fold. Then BAM!. It only takes a couple of times before he'll slow down on his steal attempts.

Everybody else seems happy to fold to your open raises as well. Start raising (occasionally) with some lower suited connectors and make him realise that he's making a mistake messing with a 2+2er on ANY flop. Watch him crumble like the biatch he is.