Looks like a good policy to me.

One thing I didn't like was the copy/paste response for violations.

It makes sense to have one. Just the text they propose uses what I'd call insider terms, and also terms that sort of put down the contributor.

And while that might be appropriate at the next level of escalation, the first level stock text should be easier for the outside contributor to understand, and should better explain the next steps for the contributor to take.