As a note for Winston, 4/5 of my characters are female and all of Falafal's are, and we've encountered 0 abuse over the matter. 'Course, we both have general chat turned off and we don't PUG dungeons, but out in the world doing events nobody particularly cares what virtual bits your avatar has. It helps that for everybody but human/norn/sylvari female cloth users, there's always a choice whether to wear modest gear or not (and with a bit of work and transmutation stones you can wear classy cloth armour once you're over level 10, but I just made a male elementalist), and the two very-much-not-human races do not have the usual exaggerated secondary sex characteristics.
In fact, the models on asura and charr don't have pronounced mammaries at all. When asked about the lack of cleavage on female charr (the kittycat race), their designer declared that in her mind the only choice was, "Six or none!" This made me giggle.