Why should people get to roll on loot when they already have a better item in that slot. It's totally unfair and unjustified.
Not only this but an AFK druid who just leapt from platform to platform doing nothing won a dps dagger....don't druids use staffs? Seriously now.
This ninja'ing and AFKing needs to be looked into, report a player in LFR like you would in a BG afk and they can be kicked during combat or atleast be loot banned it's totally unfair.