So does email. 10 years ago when fiatjaf joined the ripple users list he introduced himself as Giovanni Parra, and that was the display name on his email. We all called him Giovanni for years. Same on other places such as github issues, etc. He then changed his display name to fiatjaf, and we all called him fiatjaf, after that. Is someone wants to use a real name let them. If someone wants to use an alias, let them. Protocols working as expected.