In my experience, most of the rape topics that popup in-game tend to be about what players will do to each other.
At worst, the comments are gender neutral. More likely, I think players on the server tend to be aware that the game has an overwhelming ratio of males and while quite violent with a hint of homophobia, those talks have nothing to do with sexism.
In my opinion, a lot of what people perceive as maturity is overrated and sometimes, downright counter-productive.
Sometimes, I think the term is applied too liberally to keep outliers in line with mainstream expectations driven by dogma.