One idea..(maybe it was said before):
If its possible to have an option when hosting a server to make setups lock.Lets say for example lock the default setup and leave options like brakes/fuel on.
I would say leave Fuel + Tires Pressure on. Those are the 2 things everyone can change in a real car without having mechanic knowledge ... and also i think people shouldnt be able to share the car setups ... if you want to be fast just learn how to do it (i havent learn yet)