>If you have a real-name, real-data policy, you can use this as a pre-screening to see if the information entered is plausible. If people want to lie, they are

>If you have a real-name, real-data policy, you can use this as a pre-screening to see if the information entered is plausible. If people want to lie, they are going to give you a fake gender to match their fake name. What you're suggesting would flag 20% of your legitimate users and 0% of malicious users.