feller i use to hunt with was on a youth duck hunt with his cousin (he was suppose to be the adult)on the way home, they saw a pheasant fly across the road, He stepped out of the truck with a loaded shotgun and went after it. He failed to notice the Game Warden pulling in behind him. between that incident and one for shooting a rabbit (which rolled up on some fellers front porch) he lost his license for 18months.
Couple years ago a waterfowl club got shut down and alot of people went to jail. They were shooting deer with rifles (illegal to shoot deer w/ rifle in IL),using lead shot for ducks/geese, too many birds in the bag, guides shooting birds for the clients, shooting swans, baiting, hunting at night, etc. The list goes on. There was 3 full pages listed in the newspaper. They lost everything-farm, business, all weapons, all vehicles, and like 3-4 people went to jail for a couple years.
As for the deer poaching, if one is caught in our area its a fine and loss of weapon. But since there are so many deer in the area (literally outnumber people) unless a warden is driving along and sees it first hand, not much is done about it.