Classic Warriors Tanking Dungeons without a Shield

First, Im a casual player. Im not up to speed on all the secrets of DF yet.I've healed two heroic dungeons in the last week where I had a warrior tank that was using two handed weapons without a shield, but neither would answer my question about why they were doing that...The first guy ran way ahead and pulled mobs while I was out of range. He immediately left the group. They both had being in a huge hurry in common...Please tell me this isn't just elitist players tanking in a dps spec to get through a dungeon 20 seconds faster... via /r/wow https://ift.tt/nUx2RHr