So would this lead to self-censorship on social media?
In contrast to yourself, I'm most self-censored here. In a game or in person is where I feel like I can speak freely. Here, not so much.
That's way I never used pseudonyms, they are practically useless in hiding your real identity. Additionally they give you a false sense of anonymity.
It's kind of like pictures of naked me. I don't want it to be public but it's not that severe either.
Also, I have no intention of using this nickname to hide my identity. You can Google it to find everything you need to know about me.