Now, from the other side of things:
My mother always told the story about a couple of her friends who, in their early 20's, did a lot of hitchhiking (they were a male/female couple). One day they got picked up by a couple of nice gentlemen, in a nice new car.
Which they were using as a getaway car from a bank robbery.
Apparently, they were hoping that the police were looking for a car with 2 people, not 4, but the police were not fooled, and the couple had a terrifying hour's ride at ridiculous speed, as the crooks tried to outrun the cops. Finally, they were let off somewhere, but they never hitchhiked again.