On Stack Overflow I needed to modify an old, unanswered question with new content, rather than start a new question. However, there are four or five old comments that pertain to old content.
Shouldn't the user be given control to hide or mark(like using a different font/color) the irrelevant comments?
I know there are security concerns, but shouldn't we trust the users who asked the question in the first place? I think it would ease the burden on moderators a little. Perhaps the comment's owner can be notified about changes to their comments, then they can override the decision if they see fit.
I do realize deletion of comments is out-of the question now.