Yup - twice by the same hubber - perhaps not deleted, but a long, and reasonably polite comment on their hub (which disagreed with them...see below) was denied - plenty of others were okayed after mine - all of whom agree.
I commented on a hub they had written advising them that their information was incorrect, and were mis-representing a group of people to whom they did not obviously belong. I probably wasn't as polite as I am here paraphrasing it - but I wasn't nasty, or even mean, I just asked them to get their facts straight, and if they were not part of the group they were discussing (as though they were an expert), then why were they commenting on it and telling them how to live?
Same hubber - different hub - this particular person seemed to like writing about a group they do not belong to as though they were an authority on such things....- much the same line, but this time I presented the facts to them (I belong to this particular group...).
Perhaps I know why this hubber has denied/deleted - they do not like to be proven wrong, with actual facts...and can't really approve a comment which does so, can they?
I make it a rule not to delete anything unless completely nasty, out of hand and rude - personal attacks, slander etc. Argument is fine, dicussion is awesome, disagreeing with my POV - doubly awesome. My rule is to let it be - because swaying my comments/answers to side with me is just.....childish.