You seem like many other posters to have missed the actual effect of the facebook announcement. Firstly it is not about the right to use 'fake' names (i.e. ones that you do not use 'in real life'), it is about the right to use the/a name you are generally/frequently known by, which is arguably more 'real' than your so-called real name.
And secondly it appears to apply to everyone, so if you are a straight male whose parents called you 'Dick Shit' but everyone apart from your bank (say) knows you as 'Richard the third' then you have the right to be known as such on facebook. So this decision gives exactly the same rights to everybody.
And yes, I realiize you might have been misled by the fact that the facebook *apology* was directed at transgender people and drag queens/kings. But that was because these groups had been specifically targeted by one person reporting them as having 'fake names'. The actual *policy* change benefits *anyone* who in real life goes by a different name to that on their birth certificate etc. I know several male and female straight people who have gone by a 'different' name for their entire adult life, e.g. just because they have a strong dislike of their birth name and this policy should benefit them if they choose to take advantage of it.