Ticker wrote:
I, however, am a little green, grouchy monster who spends most of time hiding just like my avatar and am neither male nor female.
Yeah, me too.
Let's face it, in this society, the male is the unmarked signifier. Gender semiotics being what it is, unless one is constantly broadcasting "I'm a girly-girl! I'm a girly-girl!" signals, the default assumption is that one is male. (Which is essentially what Mikomi and Ticker have already said.

)
Reading a member's profile, and their previous posts, is a useful exercise because it facilitates a better-informed response to their posts, over and above knowing which pronouns to use.