To answer your first question.
What is an illegal username?


An illegal username is any name that contains characters that are not standard AlphaNumeric + Underscores.
example: ABC... abc... 123... _

These usernames have been created with various methods since the sites creation and you may have seen a few users floating around with a space or dash in their name. Myself included!

If your interested in these unique players and their profiles, but don't want to sift through ever single registered user; then don't worry cause I did the work!

It took many hours and a bot to log them all, but here it is. The culmination of my work:
https://pastebin.com/Ee5LAKqW

Thanks for those who were interested in this project and waited patiently for the results!