who is more afraid of who? if the track car screw up, they have to get it repaired for the race. If you screw up, u tow it back and take bus to work. My friend in his cheap little starlet was tailing one track car last year, they asked him to overtake, coz they have more to lose if something happen. After all, it's an open track day for everyone to enjoy the track, and there are closed sessions for MSS practices anyway.
So my 2 cents, don't worry about the track cars. If they have any sense, they will look out for you!