When one down-votes or votes to close, you're supposed to offer a comment so people know why. Kind of a worthless request that people do so if the mods are just going to go and delete the comments that explain your actions.
I voted to close and down-voted a question because the claim being examined is completely lacking in noteworthiness, IMO. I left a comment on the question explaining why I felt it was not noteworthy, and that I voted to close and down-voted.
So the comment was deleted. Seems like specific feedback about why you feel a question is lacking and why you took specific actions would be "on topic."
Again, we seem to have the standard of if the mod does not agree, it gets obliterated, which is much, much worse on this particular stack than most others. I'd especially think a stack dedicated to objective skepticism would need less arbitrary actions from moderators.