At one time I was commenting anonymously on several political blogs. I'm now commenting exclusively as myself, and I've noticed something interesting. My old pseudonym was an abbreviation of my middle name, and could be interpreted as either male or female. On reflection, I'm pretty sure that most other readers and commenters assumed I was male. And, while it could well be my imagination, I reckon people are more polite to me as a female entity than when I was assumed to be male, and are more polite to girls in the blogosphere generally - at least when they address them directly*.
All this is a propos of nothing in particular except that it was quite nice being a fake man. I felt as though what I had to say was the most important part of any comment or interaction I had online, and no quarter was given for the fact of my being female. It was like I'd sneaked into the secret boys' club where arguing is allowed. I loved it. It gave me a taste of a world where I was finally part of the male in-crowd. However temporarily.
* Whaleoil ran a post recently that was so misogynist in tone I couldn't bring myself to comment on it. And the comments that followed were worse. Improbably. They were all written with the assurance of men who expect only to be read by other men. For a link to the original post and comments, cut and paste this: http://www.whaleoil.co.nz/?q=content/truffle-hunters-vote-labour. You've been warned.