Not ninja looting. The established rules in both of these cases is ML and the MLer can distribute the loot anyway that they see fit. As far as Blizzard is concerned, these external systems are fake news. They have no way to validate the information in them. They might as well be saying that Hillary was using a pizza parlour as a front for a pedophile ring. If you believe these external systems than you deserve to get no opportunity for loot.
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That's not what it is about at all. People can report all they want but if there is no evidence of what all the people reporting are claiming then there is no ban.