He means that it's against the law.
Yeah, that's right - they are protected by the Migratory Bird Act of 1918. As I recall this was enacted to deter trade in feathers, among other things. Why it remains a 'blanket policy' today where BOP's and livestock are concerned is beyond me.
This is a sore spot with me. Before 1918, dealing with hawks was easy. You trapped them and dispatched them, or dispensed with the trap and shot them from the sky. I've seen clever trap designs in my old poultry books. It was a simpler time and there wasn't the kind of regulation this generation takes for granted.
To be fair, you
can still remove BOP's as a threat today, but you must get approval from the governing agencies in your district.
YOU must prove they are a threat, first, and you must follow proscribed methods of killing them.
The burden of proof is on you, and there will be an investigation before anything happens. In other words, you become a suspect to be questioned.
That's a tough thing to beat. Shoot a hawk today without following this plan and you risk fines and perhaps jail, if caught.
It used to be different, though. People didn't look over their shoulder much; anyone who did was telling on himself as being up to no good.
A man did what was needed to protect his affairs so a hawk preying on the chickens had to go - that's all.
Now, the dang things wait on the fence rail for the chicken buffet to start each day. Meanwhile, you are made to erect 'deterrents' to thwart them.
You must employ trickery in hopes they will stay away.
If you attempt to actually take action against them - - well, you can't even disturb them. That's against the law, too.
None of this unlikely to change, either. Too bad, I think.