If I'm not mistaken, don't most states have laws against non-hunters interferring with hunters participating in lawful hunting, especially in the East. I think these were mostly passed during the later 80's and 90's, when many anti-hunters were interferring mainly during deer seasons. These laws allow for the arrest of the interferring parties.
As previously stated many people know exacting what they are doing. And as previousl stated I would never shoot a dog regardless of the idiot on the end of the leash.
I don't want to hijack this thread, but since were are talking about dogs, I'm going to relate a story that happened to me. In 1999 I moved out of AK and was visiting my sister in CT. About a mile from her house is a section of state land, 640 acres with resovior. As a kid I hunted grouse there, to get to it from the closest road, we had to climb a 300 foot very steep bluff because the resovior was off limits. For CT it is pretty remote. Today, fishing is allowed in the resovor and there is a 1 1/2 mile walking trail around the res. One day, my sister and I were walking my two gundogs around the res. Since it is still pretty isolated, I had my dogs off their leash, but had e-collars on them. My female bumped a cottontail and gave chase. I let her go as she normally would return after a few minutes. This time she didn't so I gave her a low stimulation, waited and nothing. So I gave her another but higher. I heard no yelp as normal and she did not return. We continued walking down the trail towards the parking lot, same direction as my female headed. Almost to the parking lot we came upon a woman holding my dog. She had removed the e-collar and was holding it in her hand. She said, "these collars hurt dogs". Needless to say I was PO'd, she had touched my dog and removed my property. I porposely reach down and riped the collar out of her hand so that it would hurt her hand and proceeded to chastize her. I kept her there for several minutes looking down at her, right in her face, just screming at her. I threw in many obscene words I'm sure. There were a number of people watching. I spent 28 years in the Air Force, 11 enlisted and 17 as an officer. One thing I know how to do, is to chastize someone when needed. In the end, she ran off in tears as fast as she could, if she had a tail it would have been definitely between her legs. She was lucky she was not a man, otherwise she would have been on the ground spitting out teeth. I pity the person that does something to my dogs. I'm sure she'll never touch another person's dog the rest of her life.