Sorry, terrible idea. I've sold most of my drops to buy the gear that I want. Extreamly rarely an item I want drops. If I couldn't sell the drops and buy what I want, why bother going to the dungeon, since nothing I want ever drops? If there's no point to go in a dungeon (and I don't play pvp), what is there left for me to…
Stick doesn't work. Use the carrot. Instead of thinking of punishments for players for not playing, give incentives to play, even in a losing battle. Give good bonuses to the 1st and 2nd of *each team*. Scale rewards according to how close the battle was, so that your team gets more reward the more points they got, even if…