I'm all for fun and games guys but you should put safety first. When they jump back into their car with no seatbelts or harness on going 70 or 80 miles an hour around the track it would be very catastrophic if they was to get in a wreck. Maybe have an inspector next to them raise a flag when they've completed buckling up and then let them go around. Safety always first!!
You should watch the trailer figure 8 races lol. Stock street cars with no cages pulling campers around a figure 8. Half of them don't even weld their doors shut.