Contextual accountability is hard. Real names / pseudonyms tend to be sweeping across a service, particularly large goliaths like Facebook where you could do t

Contextual accountability is hard. Real names / pseudonyms tend to be sweeping across a service, particularly large goliaths like Facebook where you could do things like political activism in a group. You either get more exposure than you're comfortable with, or more privacy than other people are comfortable with. Real name policies also tend to be cultural where usage of real names tends to encourage more usage of real names, even when it might make sense not to use a real name.