I thought that GitHub supports some sort of locking repo, such as not allowing PRs? As X allows comments from accounts mentioned in tweet.
You can restrict PRs only to 'collaborators' of your repository, or you can disable them completely.
Disabling PRs and issues (and wiki and a bunch of other stuff) is indeed supported by GitHub AFAIK.
You can restrict PRs only to 'collaborators' of your repository, or you can disable them completely.