Facebook outed me.
They did so, not for being being gay or transsexual, but for having a second anonymous account associated with Pagan, occult and other alternative communities on Facebook.
Be warned - Pagans, drag queens, transgender people, gays living in countries where they face violence and murder, non-mainstream religious groups - anyone not using their "legal" names in order to interact safely online without fear of exposure or persecution - Facebook has appointed itself in charge of moral policing and is gunning for you.