Nothing ever gets banned for no reason. 3d pilots can be very inconsiderate of others, leading to that kind of flying being banned in many clubs. If you don't want it happening in your club, don't hover over the runway or get in other's way who are flying the circuit. Sometimes helicopters aren't allowed for the same reason. For multirotors, I don't see why they would want to fly them at a club field, but if they did and were banned it would probably be for jerkish behavior too.