[nfoz]

Veering off topic but I absolutely hate that git requires you to have an "email address" (which cannot be empty and iirc must satisfy some regex criteria for a valid-looking address). A particular choice of user identifier or communication medium should not be hardcoded into the totally unrelated concern of source-control, IMO. Anonymous and non-email accounts should be first-class things. Instead of email maybe you'd want to have your public-key or something.

[Bayart]

AFAIK git was made with an email workflow in mind. Git's the byproduct on the Linux kernel project, for better or worse. GitHub provide a fake email address that's tied to your GH account for commit stats, which is an appreciated utility.

[marwis]

Nothing is stopping you from using anonymous@localhost or YOUR_KEY_ID@publickey