Have they ever been enforced? Probably not.
Yeah, they have. On State Wildlife Areas on the Westside of the state, for example Stillwater Wildlife Area near Carnation, the Department of Wildlife releases pheasants for the Seattle city boys who do not want to venture over here to the eastside of the state to hunt wild birds. Every year on opening weekend there are usually a bunch of greenpeacer types who insist on walking in front of the hunters, banging drums and yelling at the top of their lungs. The game wardens are on hand to place them in handcuffs and haul them away. I am sure some judge releases them without any charges but at least they are hauled away. It isn't my type of hunting. In fact, it is more like killing a barnyard chicken. There are dozens and dozens of hunters along with almost as many dogs of all quality, shapes and sizes charging hellbent into a flock of recently released pen-raised pheasants. Once was enough for me.
Closer to me in Eastern Washington, people (Seattle) have spent millions of dollars to build summer homes on the Columbia River. In a lot of cases the property owners assume they own right up to the water line. (I always say look at your plat map). Often times they do not. It is pretty common for a partition of the land along the river to be owned by the County PUD that has the dam on that stretch of the river or the Corps of Army. Over the years no agency enforced the rules and regulations, so the property owners just started landscaping right up to the water line. This practice has ended. There have been some of these landowners who have become quite angry when they call to report there are waterfowl hunters, who accessed the property by boat, shooting ducks and geese off the riverbank near their home. Then they are told if they harass the hunters, they will be arrested and not the hunters. I don't think the game wardens care about politics. Their bosses in Olympia probably do, but the ones out in the field are most likely not to care.