alt Hacker NewsOne problem is that GH gives you no way to disable PRs. And even if you write in BIG BOLD LETTERS that PRs should be on Codeberg not GH, people get upset and make a fuss over their "ignored" PRs and it ends up making unnecessary headaches for you over and over.
Can do it the @torvalds/linux way and have a bot auto-answer/close PRs. And, to be honest, probably is better to ignore people making a fuss over PRs.