One day, when the OP grows up, he'll learn to treat people and things with the respect they deserve.

I've rented hundreds of vehicles, but never put a dent in one or driven it as if I stole it. I treat other people's stuff the same why I'd like them to treat mine: With respect.

But you want to be a childish moron, burning off fuel for no good reason, or near-trashing a perfectly good vehicle just because you can, go ahead. One day it's going to bite you, and then I'll be the bloke laughing my arse off as they haul your battered and bruised body from the wreckage.