[Symbiote]

GitHub has the option to limit issues, pull requests and comments to not-new users, previous contributors and/or previous committers.

The setting applies to a whole repository.

[candiddevmike]

IMO, those are temporary and meant for cool offs, they're not a real RBAC solution.

[consteval]

I think the level of granularity isn't high enough. Ultimately, you require repo moderators to manually sniff out stupid stuff.