Years of hitching and I've only had one scary ride, and in retrospect even it was more weird than scary. I was in South Carolina and got picked up by a good 'ol boy who was very insistent about wanting to suck my c**k. Despite continued and vocal protests that I was really not interested, he still pulled behind a school into a parking lot rather than going on into town like he'd told me he was. When he stopped the car I got out and started walking away and the town sheriff pulled into the parking lot moments later, ignored me completely, and drove over to the guy's car. I kept walking. I still don't understand, I mean, if a guy's not into it then I can't imagine that going down on him would be in the least satisfying to either party. And a school parking lot? I guess he just wasn't the sharpest crayon in the box.
Lots of fucked up opinions and conversations through the years, of course, but that was the only time I felt like something overtly non-consensual was trying to happen. Lately it seems like everyone who picks me up wants company to smoke their pot with while on the drive. Not a bad thing, I guess, except that this trend only started when I decided to quit smoking pot for a while.
(btw. not that it matters, but I'm bi and in other circumstances and with other people the offer may have been welcome, but once it was clear it wasn't welcome the rest of the episode was just weird.)