I was reviewing the Late Answers queue today, and this thought happened upon me. For reference, this is the review. This answer should not be an answer, as it just suggests something to the post author that may or may not work. However, this user only has 3 reputation, and as such doesn't have the 50 reputation making them able to comment on that post. What should we do in cases like these? It seems that these truly are not answers, and should be comments, but the users cannot comment them. Another example is here.