Well, I think a lot may depend on your past record...

My brother has a former coworker who is banned from Hertz for managing to destroy at least three transmissions..... He was billed for the last one (I don't know if he wound up paying)

(And yes, he destroyed the transmissions it wasn't just bad luck. Did you know that if you sit if Ford Tarus long enough with one foot on the gas and one foot on the brake and slam the gear shift between gears at high speed you can destory one??? This guy thought that was great fun)