Possible Loot Scam

If you believe a loot scam has occurred, Dräper, then please contact in-game support. You may also wish to review the following support article:

What is Blizzard Entertainment's stance on "ninja looting" within the World of Warcraft?
http://us.blizzard.com/support/article/17761

Here's an excerpt:

Q u o t e:
Okay, so scamming is against the rules…what exactly is a scam?
In terms of loot, making and then breaking a clear in-game agreement on the way loot will be distributed by a Master Looter can be considered a scam. Unfortunately, some players will make loot agreements they have no intention of keeping to get players to join a dungeon or raid group. In these situations, players who disregard the original agreement and then take (or give away) loot in a different way are potentially violating our Scam Policy. If you believe you have been scammed, please contact In-Game Support.

Please note that if In-Game Support is able to determine a scam has taken place after a clear in-game loot distribution agreement is made, any items involved may be removed from their current owners. In cases where a "rightful" owner can be proven, these items may also be transferred; however, loot will be left unassigned if a "rightful" owner cannot be identified. Due to the privacy associated with these investigations, In-Game Support will be unable to release details regarding an investigation's findings, actions taken, or its final outcome.

*A clear in-game agreement indicates that loot rules are fully defined. Partial agreements that do that wholly explain how loot will be distributed may prevent In-Game Support from assisting. If using Master Looter, please be sure to clarify with your raid group whether or not any items are reserved, what (if any) restrictions will be placed on rolls based on class specializations, and how winners of open rolls will be selected.