Under pressure from cross-dressers, Facebook said it would relax the "real name" policy and allow people to use aliases, but only if they are generally known by those aliases.
However, reportedly Facebook has not really changed the policy.
Even if Facebook makes this change, it will be unacceptable because companies and the state will be able to connect the account with your real identity. In order for the site not to mistreat people, it must let you have one account to show your boss and your parents, another for your friends, and others for various kinds of political activism"
https://stallman.org/facebook.html#realname
Also, real names allows US gov and other non-democratic regimes to identify people and their personal networks and go after them.