I could see this becoming useful to denounce contributors. "This user is malicious, a troll, contributes LLM slop, etc." It could become a distributed block list, discourage some bad behavior I've been seeing on GitHub, assuming the denounce entries are reviewed rather than automatically accepted.

But using this to vouch for others as a way to indicate trust is going to be dangerous. Accounts can be compromised, people make mistakes, and different people have different levels of trust.

I'd like to see more attention placed in verifying released content. That verification should be a combination of code scans for vulnerabilities, detection of a change in capabilities, are reproducible builds of the generated artifacts. That would not only detect bad contributions, but also bad maintainers.