Completely appreciate the points you laid out in both of your comments, thanks for sharing!
One counter-point, just from my own personal experience, but adopting a pseudonym online has actually allowed me to be more authentic and more sociable. I've made a lot of awesome friends that I don't think I'd have made had it not been for being pseudonymous. It can be quite liberating and reduces the fear/impact of trying new things, speaking to new people, and more.