track schools generally have a strict rule on no passing on the inside just for that reason. I'm guessing they might give you one warning for the benefit of the doubt, but twice and they'll probably send you home.I'm not overly worried about crashing on a closed course if I commit an error, I'm more concerned about another bonehead/rookie/aggressive/panicked rider taking me out. You have no mirrors to see what's behind you or to the sides along with taped/disconnected brake lights of those in front of you as on the street.
If you avoid riding with others who you don't know on the street, why would want to do so on the track?
I did one several years ago on a sportbike, it was a ton of fun, but I'm not sure I really learned anything from it. The best part was bringing the bike home with tires that looked like I'd just finished a GP race.