As someone who works closely with birds of prey, I really wish this idea would go away. To me it's really not about whether or not it's dangerous to the raptor. It is, sure. But it is incredibly easy for a drone to evade a raptor by going straight up. No bird can climb that fast, not even a peregrine falcon, which is the fastest raptor going down. Any drone operator who's got half an eye on his/her drone will see that eagle coming and just get the heck out of there.