My vote is that if you're obviously clueless on the arrival/landing, someone touches base with you during the taxi phase and verifies that you have the Notam in your posession. If you don't have it, you get violated. Period, end of story.
If you do have the Notam, you get a quiz - "Why do you think we're having this talk? Etc." If you're clueless, you get violated.
The bottom line is that even good pilots occasionally mess up, and with 10-15k people landing at Osh (or 5k at SnF) a few good pilots are gonna have "oopses", which can be forgiven if they are aware of the problem, its cause, etc. The truly dangerous people are the ones buzzing around without a clue as to what they are supposed to do.
Yes. What Kyle said.
Most of the violations I notice at OSH are *not* the "oops" variety. They are the "Blatant disregard for any pilots, pax, controllers other than themselves" variety. For example, the Luscombe that landed on 27 two years ago, not talking to anyone, while we were all landing on 9. And then proceeded to take off directly into landing traffic once he figured out he was in trouble!
Last year, I heard and saw far more violations than I've ever seen before, and more people calling in COMPLETELY clueless as to what was contained in the NOTAM. I think I heard at least three people call the tower as if nothing particularly special was going on that week. You know, "Oshkosh tower, Cirrus 1234X is 7 miles south, inbound for landing." "Cirrus 1234X, Oshkosh Tower, please fly the Fisk arrival." "Uhhh, tower, 1234X, what's that?" (or "Yeah, um, we, uh, left the NOTAM behind, can you tell us what to do?") The controllers are the best of the best, which means they are WAY too patient with some of these jerks.
However, I think that the most frequently violated part of the NOTAM is the departure. People always freak about the arrival, but once they're in, they enjoy the show, and then leave without a care in the world. It's bad enough that when I take someone new into the show while they're landing/departing on 27, I point out that they need to help me watch extra carefully for traffic that departs 27 and does not remain at or below 1300 feet until clear of the delta, meaning that they fly RIGHT through the arrival path.
I am SOOOOOOO sick of idiots up there. Enforcement needs to be stepped up.