Much like your own, and this one!

I wonder if this ritual of meta-self-policing serves some particular purpose or if it's just a case of the brain drawing comfort from going through a familiar ritual. "This comment adds nothing" is like the reverse amen in church of our days.

Another example of context collapse. Meta-meta commenting always adds something if only unironically.

The purpose was to discourage comments which added nothing I thought.

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The GP comment adds social pressure so useless comments are less likely to be made.