There's this extremely weird disappearance case from "your era", so to speak, of a UCLA freshman boy who walked out of his dorm at 4:00 a.m. in the morning in December of 1999 and was never seen again. His name was Michael Negrete. The main theory in the case is that he went on an acid trip, voluntarily left his dorm, and then got wandered around Los Angeles incapacitated for a bit until someone abducted him.
Honestly, I got the impression that he was likely meeting up with some guy for a hook-up and wanted to do it while his roommate was asleep and he met with the wrong dude. Witnesses who lived in Dykstra Hall (where it happened) said they saw a 35-year old guy randomly walking around the dorm at the about the same time Michael disappeared. I mean, this would have been the time where you were making up hookup plans on like bulletin message boards.
But yeah, I mean, if a A-honor roll student from a nice family could get swallowed up like that, it's hard to imagine what happens to the boys who aren't from the types of families that can send their kids to UCLA.