If they get caught they can be charged or imprisoned. Hunters have a RIGHT to hunt. We sent a lady on a pre-paid trip to the local police office last year durin duck season. She saw where we were set up and decided she was going to fire up the boat and chase all the ducks away. Well, we called the marine police after a few minutes of drive-bys and incessant expletives directed toward us and our mommas and the ducks got up and flew around. They came straight back to us. So, she ended up watching us down 5 of "her" birds, and she had to go have a talk with the department.
Then there is the ongoing phenomena with the trucks at the boat ramp. There have been several trucks that have been vandalized. Keyed, spray painted, broken windows, lugnuts removed, tires slashed....none of it has been proven to be sabotage though. The police just make more runs through the lots and ask alot of questions about the cars that don't have DU stickers, camo, or a trailer behind it.