Playing the blame game, especially publicly, is a bad way to encourage psychological safety in a community. See Linus Torvalds for examples (he has recently become a bit softer with his feedback).

A better option is to make clear expectations of what a good PR looks like. Then if expectations are not met, you can give 1 on 1 feedback. Don't just blast a noob in public or you can leave emotional scars.

[–] [email protected] 2 points 2 years ago

Don’t just blast a noob in public

true, but also when someone who's been around for a while and ought to know better, it can really help to remind them that they're not above the rules