I'd never get in another person's car if I didn't know them. Not a women, not a man, no one. I'm a small dude, I can't fight, and I tend to do really badly under pressure! I don't like cars much as it is, and someone else's would just freak me out so bad. I've seen a lot of movies, and things like that usually don't end well.
(not that I put a lot of faith in movies, but still)