The Mail's article on a schoolgirl who died of a heroin overdose saw a spat break out in the comments between 'Cheeky' and 'Unbelievable'.
At first, comments were moderated, then they all disappeared, then returned unmoderated. Some of the insults that passed between these two have since been deleted, but this one hasn't:
Even if that has got through because the comments aren't being moderated, there's no excuse for it to still be there some eight hours later.
(Hat-tip Guy Kelly)