Sorry, backwards culture. I live in Russia, participants of discussions in the Web in any place outside of main social media are mostly male. And when they are not, you can detect women by being more polite and tactful, but caring less about orthography than the rest (that's empirical, can't say why). Partner preference - same reason.
well, sometimes people on the internet are women or gay. Also, I don't think that's true, Russian internet culture is just really misogynistic (more overtly than the "western" internet) so women sometimes use male pronouns. I'm Russian too and know a few women who do this.
Assuming everyone is male is actually part of the misogyny, please try not to do that