Every teacher I know either doesn't use Facebook at all, or if they do, they don't use their real name. Why? Because they know that their students are going to look for them on Facebook out of curiosity and gossip amongst themselves about any detail that's on there (or if it's locked down, try to sneak onto their friends list and then gossip). They often have to be very careful or else they could easily get in trouble.
One of those people will actually leave a movie theater if they spot one of her students in the same movie, because she knows from experience they'll take pictures of her on their cell phones and try to catch her saying or doing something even slightly off.
Teaching can't be the only profession where people want to be careful about using their real names so they can easily be found by anyone who wants to look. And it certainly isn't just a tiny number of drag queens either.
No, we require our social networks to provide us with meaningful, usable, robust privacy controls. When they don't do well enough at that (difficult) task, we insist on our own privacy measures, such as pseudonymous use.
> or if it's locked down, try to sneak onto their friends list and then gossip
You can't 'sneak' into a friend's list. If you're paranoid enough not to use your real name, you can be paranoid enough to hide your name in searches and lock down your posts; it's not hard.
That argument makes absolutely no sense whatsoever. It's trivial to obtain legit sounding names for spamming purposes. It's better to report actual spam than something indirect such as names; being able to report accounts just for their names is asking for abuse.