Re: wake ?
If all you want is a rooster tail, they make little scoops that do just that. A speed shop might have them or full service boat dealer. If you want to be doubly cool, mount one on each side. They do not make a wave (wake); just shoot a stream of water up in the air to the rear of your boat....the faster you go the higher the tail.
Again on you wanting to tip everyone's boat over just for fun, you are asking for problems which could range from a black-eye, to jail, to financially endowed......Need I say more?
Mark