Maybe that's a subset of 'gaming culture' you've experienced. But, I've played in many, many large online areas across a diverse set of games, socialized in many gaming forums online and, simply put, this would not be acceptable behavior at all and would quickly get people tossed out.

It feels like you are saying 'well, boys will be boys', and that's honestly just a way to rationalize unacceptable behavior by refusing to taken ownership of it.