This is a point I was thinking about. The idea of "well, it was the last day so I killed the first thing that walked by". Even if we haven't done it, I think we have all heard it at some point. I think it is easy to understand when you charge $700 for the permit. Crazy idea...could you change to a structure more of a "take" fee? Probably couldn't collect it after the fact, but FWP could charge $800 for the tag and if the hunter didn't shoot something give him/her a $200 credit on the account. Could be similar for residents - pay $100 and return the unused tag after the season and get $75 back, but I'm sure they would hate it.
I'm making numbers up, of course, but you get the idea. Maybe it would save a few forkies. I can't think of way to change that behavior and any changes in structure are hard to make money-neutral.