I was toying with an idea similar to this a while back, time travel rape. Part of it depends on what version of multiversal thinking you want to get into, whether that rape affects the timeline from that point and creates an alternate universe.
One idea I had was in a time where time travel was available but not condoned due to how crazy things can get, there was a group of time sex tourists that would travel to various places in time and kidnap victims that disappeared or were about to die, then go to town on them. There was a movie from the late 80's called Millennium, where people from the future would repopulate their world by rescuing people from disasters at the last second, then replacing the supposed victims with corpses to keep the body counts accurate. This is similar, except with a lot more rape. For example, use the recent condo collapse in Florida. Just at the moment that the roof came down, a young woman was plucked out of time and transported to the future where she's used by these villains. History records that she died in the condo collapse, but due to the wreckage and upcoming storm, they never found the body. That's because she's in the distant future getting fucked six ways from Sunday. Ever wonder what happened to Amilia Earhardt?
I'm not as confident of it working in future times, unless it went to a point post-collapse. I figure as soon as time travel becomes a thing, some group will come around to monitor and keep control of time travel, and they'd hop on someone from 21st century popping up in the 32nd century in a flash. Probably before they even left, which leads to its own set of paradoxes.
Another idea is going back in time and being Jack the Ripper or some other serial killer, but there's too many awkward things about time travel at that point.