Unfortunately this is something that plagues not only our industry, but as you say we have the advantages of having the skills required to restrict these people’s anonymity thanks to technology.
These people are only limiting the diversity of our community and the difference points of view that variety brings, be it from an attractively dressed man or woman, straight or gay, single or married, with or without children.
I agree completely with disallowing anonymous users, let people at least take responsibility for their opinions and be picked up for them in person if they are out of line.