In Canada, at least, a drone (even a consumer drone) is considered an aircraft. Shooting at an aircraft is not, legally, a very good idea. We're admittedly talking about a group of cops that don't seem to hold the law in very high regard, but intentionally shooting at an aircraft is likely to get some investigation from people a little higher up into the food chain. Airspace is federally regulated and the regulatory agencies (Transport Canada, FAA) don't generally like other agencies on their turf, shooting at things :)
