Nineteen-year-old Brit Gemma Barker created fake up to six male identities in order to have sex with two teenage girls. When she was eventually discovered, she was sentenced to 2-1/2 years.
She wore hats and baggy clothes to hide her actual gender, and she created several fake Facebook profiles in order to find out what her two victims were looking for in a boyfriend.
When she was arrested, she tried to claim the police had assaulted her by breaking her own jaw. So yeah, she's got some problems.