With one of my cheapest boats being in the $600.00 range, we don't bash! Don't think about doing stuff at boat races that you can get away with racing cars and trucks or you'll find yourself drug off the site and very unwelcome at any other races.
What you do in a pool with your buddy is up to the 2 of you. I happen to have a ZZR and still wouldn't bash that. Accidents do happen when playing or racing but they are just that. Dirty racing is not tolerated.