The whole concept of "real-sounding name" is incredibly subjective.
Your name is what is commonly used to identify yourself. If you use different identifiers in different contexts then you can have multiple versions of your name (e.g. many people called Jon actually have Jonathan on the birth certificate or passport).
I have a number of friends and acquaintances who were first introduced to me in real life by what started out as nick-names or online idents. Some of these people use a nick-name in personal life and their original birth name in their professional life, some use their nick-name with everyone but their passport and bank account, some have gone through the process of legally registering their new name and have no other legal name! In many cases I went years before knowing which category my friends were and what their official name was.
Requiring real-world identifiable contact details before allowing someone to sysAd important project infrastructure seems sensible enough. Ignoring people's contributions to mail-lists because it fails your subjective realness test just seems pathetic.