I treat mine as semi. I mean I'm not trying to hide from the government or anything, but yeah I'll say things I might not want to say under my clear name either. Don't we all? We all wear different masks in different groups. We all are different people in different groups too.
We're human, we all have stuff to "hide". I might want to vent about my boss or work and if they heard it that would certainly take it different than it was intended. We even complain about our friends, especially our close friends. Because no relationship is without conflict. But being human we often have to actualize our feelings with words, because we're social creatures. I'll at times complain about my partner, but that doesn't mean they also aren't my favorite person in the world.
To be human requires some anonymity. And no one should feel like they're going to be scrutinized for every little thing they say.