I judge people based on their username
Can you explain how you judge them?
First of all, people tend to choose usernames that are not pleasant for the ear. Second of all, you can already see the person's personality based on their username.
You shouldn't judge people based on their usernames. Creating a username can be difficult and people often do it at a young age. It's not good to assume things about people based on their online names.
Fine, I will try to not judge people based on their usernames.
Funny story even I have an old email of a nickname my parents called me as a kid. That account is so old. Have you ever not been really creative and had to make something up on the fly?