> Most people sign off on a review, with the expectation that the remaining comments will be addressed

People should be made aware that that's a bad and dangerous practice, because by doing that they are directly requesting unreviewed changes, because it means that now nobody needs to review the follow-up to their review. People need to learn to not sign off on code that they believe needs to be changed. Saying "I believe this code is wrong and needs to be fixed but am confident that the next version you produce will be completely correct without further review" is lazy reviewing and leads to inevitable disaster.