Nudity on stage can be powerful, and is still protested, but not as powerful as the frightening glimpse I had as a child of Ethel Merman in Gypsy . Now, if you could get the ghost of Ethel Merman and the undead Mickey Rooney to strip to the waist for 10 rounds of bare-knuckle action, that would be truly frightening stage violence.
Stage violence can be very frightening in some cases.