A new rule has been introduced - 3.11, which prohibits cheating players when distributing loot in raids and dungeons (ninja-looting). To make a complaint about ninja-looting, the player must provide screenshots which confirms that raid leader said loot distribution rules, and screenshots where these rules were violated. As a punishment, the raid leader (or responsible for the loot) will receive 3 days of ban, and the item will be removed from the recipient's inventory. Keep in mind that the item will be removed without being moved to another player anyway (if he previously won the roll, he was promised it, etc.). Each situation will be individually assessed by the Game Master.
We recommend you to clarify loot distributing rules every time you go to raid with strangers.