I don't go by aliases much on the internet, but support peoples' freedom to do so. For example, if someone on this forum were from Iran or Saudi Arabia, they could face persecution for producing their own beer... hell, if someone just came from a Mormon family or something, they may not want the whole world to know that they like making beer, and who am I to judge them if they choose to keep something private that I personally choose to publicize?
As for me, my user name is Skyler because that's how my first name is pronounced. Schuyler Alec Campbell, Esq., is my true and full name and title, which I imagine enough people could figure out if they bothered looking into it, but I hate how my first name is spelled, and so I use the easier spelling whenever I have a chance.