Bingo.

It isn't that there is much (if any) direct hostility toward female posters themselves, it's the nagging sense that if this (offensive posts) is what these people think about me (women), they're really not that open to the idea of having me (a woman) as a participating member (unless I'm hot and post a picture to prove it and am willing to put up with sexual innuendo as an addendum to many of my posts).