The "Texas Chainsaw Massacre" hitchhiker really made people never want to hitchhike again - the hitcher, the show. Hitchhiking is always vaguely sexual.
I really didn't have any bad hitchhiking experiences. The only bad experiences were standing by the road for 10 hours. I never thought I'd get a ride with a ministers wife or a coalminer or a Republican elected official. It was all pleasant surprises. The only drag was the waiting.
Hitchhiking, intrinsically, is sexual and dangerous. At the same time I never really felt scared. I was scared that nobody would pick me up and that I'd be waiting by the side of the road for a week.