There have been accusations that comments were permanently deleted by an administrator. Since this accusation is serious, perhaps a better feature for moderators, instead of deletion, is "suggest deletion", which can only be approved by polarkernel. This way, no future user can claim that comments or posts were deleted by a hostile moderator unilaterally, and polarkernel would know all the content which was deleted. Needless to say, only outright spam, legally objectionable material (like deanonymizing a user), or material accidentally or incidentally imported from another site should be deleted, all the rest should just be hidden. This was agreed upon early, and it is still policy. I don't know if the policy was followed, but perhaps we should make it impossible to violate?