Linux doesn't allow anonymous contributions:
https://www.kernel.org/doc/html/latest/process/submitting-pa...
and this guide has been adopted by a lot of GPL-licensed projects (at least openwrt, glibc and gcc).
FWIW I like Asahi Lina, just trying to understand the discrepencies
It seems like this is how the ASF runs: you can be anonymous publicly, but you have to sign their CLA (or whatever they call it) properly.
To me, the people trying to unmask Asahi Lina are being simultaneously mean and silly. If it's so obvious that it's marcan42 doing a voice, do you really need to point it out? That's kind of the joke.
You can do a certain amount of identity obfuscation online but for anyone with a real professional profile you're generally not really anonymous if anyone really cares to find out your true name.
For these kinds of projects you could make up an identity relatively easily and nobody would know, but you're screwing over the project (as they may need to remove your contributions if they find out), so it's not something to be doing if you actually want to contribute (instead of inserting backdoors).
The original idea (not being able to contribute without a verified identity) is still wrong, but it's wrong because it's impractical to prove identity in a way that people find acceptable (and works), not because people will not give up anonymity, as many of the replies state.
I do think it's difficult to verify identity in any reasonably acceptable lightweight way. That said, for the larger projects I'm most familiar with, a lot of people work for companies, attend conferences, etc. They may go by nicknames day to day, but they have known real identities and their professional existence wouldn't be possible without one.