I would argue that the most popular RPG is an adolescent power fantasy and coincidentally a lot of fun. In my years of gaming, I don't think I've ever witnessed a player or DM act out a sexual assault in game. I don't doubt that it happens but I've never been worried when playing with new people.
I've been lucky in avoiding that too. But Jean Wells and Kim Mohen in Dragon #39 wrote on the difficulty female players found themselves running into
Roger Moore's article on Women in D&D in Dragon #57 was brought up elsewhere recently.
That he felt the need in the paragraphs that follow to explain that having NPCs rape female players characters was a bad thing says something about the state of some of the folks at RPG tables.