I guess that depends on the effectiveness of Law Enforcement where you live. Years ago, AC would not even respond out here in the county unless it was a rabies case. They are better now, but they certainly aren't going to respond at 3AM on a Saturday or whatever.
True I guess. The law enforcement here is pretty good and if I did have an issue I know they would be here whenever I called. It is unfortunate that they have not been reliable in animal cases. Now days they seem to be getting better about taking animal cases more seriously with a lot more attention on animal abuse and whatnot. I want to state I am not an animal rights activist or anything, I just think it is wrong to kill someones pet no matter what the circumstances.
One thing you could try if you are seeing them on your property is a paintball gun. I have heard that if you get em a few times with one they will stay away but I don't know from experience. Good luck whatever you do.