Totally right, as a drone flyer myself I asked a friend who is a helicopter pilot currently working for the government here and his professional opinion is that drones are so lightweight they would be instantly destroyed in a collision with the tail rotor. Collision with the main rotor he says would be almost impossible from the wind turbulence pushing down, the drone would have to be very large and powerfull to sustain itself on that kind of wind, unless it came from the top on which case the tail rotor rule applies.