Back when I started playing games online, guys could be a problem. During everquest I had several "stalkers" from my old guild (who had my email address because our leader required all members to give him their email addresses and put them on our guild website). Didn't go past annoying emails, but it was a pain.
I ended up leaving that guild, and since then have barely had any issues. In fact, I would say in comparison to a few years ago, guy/girl relations in games have gotten extremely better.
I'm sure the original poster just got stuck with a few of the jerks, and as it's been said, ignoring and changing districts is the best thing to do (if they're really bad you could report them too).
I am however tired of this "I will assume all girl characters are fat guys" thing (and
Borealis, I really can't understand why you would not talk to any female character.. you're not going to allow yourself to speak with a large percentage of the players then). Someone has to post something like it anytime something like this comes up. If you're playing the game, you shouldn't be thinking about what gender the people around you really are anyway, right?