If it were me, even if I read “situations could involve mock rape of participants by a live actor” on a waiver, I would give it a firm NOPE.
Like @Shuck wrote, there’s a difference between being killed and eaten by monsters and being raped. Rape is something that happens to a lot of people, while being chased by a dude with a chainsaw or pursued by zombies is not, so it is easier to suspend your disbelief in that regard.
