Never been interested, because I was sexually abused in middle school (never touched, but had at least 10 boys tell me on a daily basis that they were going to rape me as soon as they caught me alone). My first boyfriend (a hardcore dom) and I cybered a little bit, and whenever things veered into ravishment territory, I'd freak out. I literally had a panic attack when his character got too forceful with mine.
Years later, my ex-husband made me engage in forced orgasm play, even though I begged him to stop, tried to push him away, and said the safe word. Even though it wasn't PIV, my therapist says that it was a rape. I think that's part of why I'm generally a dom, but I wouldn't indulge my sub if he had a rape fantasy. If there's even a hint that he wants to stop, I'll stop and ask his permission before we continue. It may slow things down, but I'd rather break the fantasy than make him do something he doesn't want to.
My sub has done a rape play scene with an ex (he's a switch), but said that it made him extremely uncomfortable, even though she didn't say the safe word.