Codeberg is a FOSS (Free and Open Source Software) alternative to GitHub, in a way. Not sure if that's what you were asking about. There are many other ways to

Codeberg is a FOSS (Free and Open Source Software) alternative to GitHub, in a way. Not sure if that's what you were asking about. There are many other ways to prevent or mitigate this specific kind of situation, as were suggested in Codeberg (Forgejo is technically the software it builds upon), like limiting email notifications to a number of mentions/people, adding a "report" button in the comments, sending notifications in smaller batches, but in reality, while these limit the attack surface area, it'll still go out to someone initially, whereas with content moderation, it's much less likely it'll go out to _anyone_. I see those as _complementary_ to automated content moderation.