Several months ago, I landed copperbell on my roulette and noticed that the tank still had his little sproutling. Not only that but the poor guy was wearing mostly level 12 gear, with the helmet from Sastasha and right away it became clear that he couldn't hold aggro.
  He was trying his best and apologizing frequently, but he just didn't have the gear to pull off of a level 60 and two level 30s. Then without saying anything to eachother the DPS and I all stepped back and quietly stopped generating aggro. I could see the THM throwing juuuuust enough fireballs to keep his buff up, the SMN stuck his Egi on passive, and I just doodled around and healed the bare minimum (which is about one spell per pull).
  Even when we had to talk him through the goop fight, none of us lost our temper, or blasted ahead and tanked the thing for him. We sat back, typed out instructions, and watched while he learned that fight.
  At the end of the dungeon we pointed out where he could buy some cheap gear and got big thank-yous all around. It was pretty cool to know that we helped teach someone, who might one day help shorten our queue times.
  He was trying his best and apologizing frequently, but he just didn't have the gear to pull off of a level 60 and two level 30s. Then without saying anything to eachother the DPS and I all stepped back and quietly stopped generating aggro. I could see the THM throwing juuuuust enough fireballs to keep his buff up, the SMN stuck his Egi on passive, and I just doodled around and healed the bare minimum (which is about one spell per pull).
  Even when we had to talk him through the goop fight, none of us lost our temper, or blasted ahead and tanked the thing for him. We sat back, typed out instructions, and watched while he learned that fight.
  At the end of the dungeon we pointed out where he could buy some cheap gear and got big thank-yous all around. It was pretty cool to know that we helped teach someone, who might one day help shorten our queue times.