And do those people who make a comment 'No comment' want to make a comment but don't know what to write or or want to suggest that 'No comment' is the most appropriate thing to write. Or are they demonstrating to everybody that they know how to make a comment. Or want to because it's fun but don't know what to say? Or for some other reason.
It would be helpful if those people who comment with 'No comment' would explain why they are making the 'No comment' comment.