Minimized comments (hot take): A fancy new feature for AMP developers to ignore serious security and openness concerns about AMP.

Namespace retirement: Agreed with Nullability, just disable username reuse, it causes a lot more oddities than just cloning projects from unknown sources, old comments link to incorrect users and the like, it's awful.

Accidental PR protection: So this won't affect anyone, if I read it correctly, who types something in the PR description? As long as that's the case, fine, but I definitely don't want to overly impose upon the drive-by contributor... as an occasional drive-by contributor. (Sometimes I fix spelling errors, someone's gotta do it.)