I was in a raiding guild for a while. It had just started up with a new server, and we had progressed quite fast through Molten Core (3 weeks to Ragnaros). One thing about this guild was that we had a *lot* of paladins. We had 14 paladins on the roster, and on one great raid we took 8 of them to Molten Core! Paladins were the one class that generally had excess people online when it came to raids. It was fun times.
The loot system we had was really good, where you could blind-bid DKP on items you wanted, with no class restrictions. Of course, most of us were new to the Core, so we saved our DKP for our set pieces and healing weapons. I did bid small amounts on crazy weapons, just in case the warriors were unwilling to spend DKP on them. By and large, I felt the system worked, and trusted us to make good decisions on gear.
I left the guild two weeks ago. We had just subdued Majordomo Executus, and were on our way to spawn Ragnaros. The guild leader (a DPS warrior) announced that any 2H weapons that Rag dropped would be exclusive to warriors, as they could get the greatest use out of them. I was very unhappy about changing the loot system in the middle of a raid, especially as I really liked the previous system, so I left the guild the next day.
Today I saw a post by my old guild on the realm message boards. They were trying to recruit paladins.
You reap what you sow.