Ninja'd loot and a GM response

I have been tanking for a couple weeks now, trying to get my gear up to par. I know Cataclysm is coming out and will render our current gear useless, but I don't care. I'm still enjoying gearing and tanking.

For the last two weeks, the one dungeon I've had my eye on is H PoS for Rimefang's 1h. Last night, it finally drops and there are two Deathknight DPS in the group from Trollbane. I mention that I really need that 1h and one of the DKs responds 'I bet you hope I don't click need then.' After he says this, it drops, and he and his friend both click need on it and leave before I can try to reason with them. This keeps happening to me. Every time a tank item drops, a ret paladin, unholy/blood DK or fury/arms warrior rolls need on it. I was in that dungeon as a tank and I shouldn't have to fight over the DPS for tank gear. If someone wants tank gear, they need to queue as a tank and not a DPS with the intention of fighting the tank for the gear.

I opened a GM ticket explaining the best I could with what limited amount of characters the ticket allows. Today, I get on and I have a ticket response stating the basic 'Thank you for reporting this issue, we'll investigate but cannot disclose yadda yadda.'

Does this mean I may get my Rimefang or is this just protocol that will go no further than that response?

Normally I would let this sh*t go but it has continued to happen and it's making it really difficult to enjoy the game and gear up.