Here's their site
http://www.ncracing.org/events.php
I asked my friend Wayne for some info and he told me he paid for 1 person, and that he was allowed to have his passenger drive one of his sessions.
But I haven't read through it to see how it works. I'm assuming / hoping that both people sign up for 1 car and you get pre-approval for your passenger to drive a session.
I can see some added risk here, if the 2nd driver isn't as skillful and / or they are trying to out do the first driver it adds to the danger of driving on a track. and with how easy it would be for the duo to time each other, egg each other on, etc, the risk only goes up.
on the other hand anytime you go to the track, you can't control who else is allowed to sign up. there could be a brand new driver who you have never heard of. on his 2nd session (no instructor) he makes a mistake and crashes into your car, that could possibly kill you.
I personally feel the chance of accident, injury, and/or death is increased with passengers, and increased with a 2 driver car. But both Jeana and I are Okay with what we feel the risk level is, and as adults we want to make said decision. (I should point out I have the luxury of having fire suits, Hans devices, and either 4 or 5 point harnesses, my decision would be different with less safety gear)
But if its not disclosed up front (before you sign up) I do see a huge problem. You should be able to make the same decision for yourself, fully aware of the exact situation.
If its not disclosed at sign up, not only should you be angry, I would think that's grounds for a law suit, or at least a kick to the nuts.