Would you buy a car from a dealer that required you to sign a contract stating they could take your car back if you carry a passenger who says something racist? Would you do so even if they promise they don't enforce that clause, when there's ten other dealers in your town that don't make you sign anything like that?
[Speaking for myself, not Gandi, and IANAL]
To answer your question, I'd probably read the contracts of the other dealers, find their clause saying they reserve the right to take the car back for whatever reason they damn well please, sigh in helpless frustration at the state of contract law, and make my decision based on all available factors, including the actual experience of other people who purchased cars from that dealer.