So today I was running some dungeons on my new Druid tank, and got SM Graveyard. The group goes forward, but the rogue stays stealthed at the entrance. We assume he's AFK so we just clear the first boss and most of the trash. By the time we get to the fountain in the middle, someone says to kick him. He starts talking saying he's only here for a bag or something(Strange, the last boss doesn't even drop a bag), and that we don't really need him, so he'll just sit there until we're done. Tried to votekick, but nope, Blizz implemented that horrendous 15-minute timer where you can't kick someone. We just laugh at him and clear all the trash to waste the remaining 9 minutes on the timer, before votekicking him and clearing the last boss.
TL;DR: Asshole rogue sat 'afk' the whole time in SM Grave, hoping to leech loot off the last boss.
Has anyone else encountered people doing this?