What's really silly, Chuck, is the way the different states interpret the "invasive threat" differently. In Colorado, they don't sell a sticker, but trailered boats have to be inspected entering and leaving every reservoir, every time. So if your pontoon is in the bed, or your canoe on the roof, breeze right past. But if you've towed it there on a trailer, you have to wait in line for the inspection. For the life of me, I can't imagine how a $5 sticker (or whatever they cost) could keep the mussels off the boat. But, then, paying some retired doofus (like me) $6 an hour to inspect boats for mussels too small for the naked eye doesn't seem much better.
I agree that forcing rec boaters to register and label their boats is taking a valid idea and abusing it for the sake of revenue. Especially if that rec boat is a canoe, pontoon, kayak, etc. But at least the money (in Colo) goes to the Parks and Wildlife guys for access and ramps. Who gets it up there in Windyland?