I'm probably missing something obvious here but why is it possible for comments to be deleted? I was recently engaged in a discussion on Stack Overflow and the other party later selectively deleted some of their comments. The context of the discussion thread then became somewhat ambiguous.
If a comment is deleted is a reason provided? Is the process of comment deletion peer reviewed? I appreciate it could be useful for good house-cleaning but it can also lead to disjointed conversations.
I know that commenting is intended to annotate rather than chatter, but there's still some back and forth involved. Sorry for the newbie question and please signpost me if this has been covered elsewhere.