I hate that. Have the balls to talk before going to the authorities. He's not worth it. You can keep poking the beast, but he'll just keep coming back. Keep up with knowing all your rights wrt the bylaws and ignore the troll as much as possible. Just smile and wave every time you see him ... it'll drive him even more nuts. Oh yeah, people in wheelchairs and/or with other disabilities CAN be assholes as much as anyone else. I'm sure he's used it to play people for years. Good luck and hang in there.