While I haven't nearly the experience on a track that you do e-, I remember being both passed and passing. Usually, if I get that out of the way early in the day, I am better later. And I understand what you're saying about having an inexperienced rider possibly ruin your day, but that's why the instructors are there, to help prevent that kind of thing. My two track days were with two completely different schools on vastly different tracks (Team Hammer Advanced @ Daytona and STT @ Mid Ohio) and there was a wide mix of riders in wach group at each school. Both schools, IMHO, did well to ensure that things were done safely and properly on the track. I agree about not wanting to be the guy who takes out a more experienced rider, but the more 'experienced' guys should also be smart enough to know how to avoid things like that as well. As long as you keep making better laps, getting better towards the end of the day, you're doing all you can. Something an instructor told me last year...ride confidently, not overconfidently. Even the go fast guys make mistakes.