Originally Posted by
ForteNightshade
If the tank pulls aggro off those additional mobs and dies as a result of not being prepared for them or the healing flubbing up. Yes, you can fault the DPS. Everyone made an adjustment but something got missed. If, on the other hand, the tank throws a tantrum and refuses to pull aggro from those additional mobs and wipe occurs (or the DPS player dies), then it's entirely on the tank because they have the tools to adjust but simply chose not to use them.
Keep in my, griefing require malicious intent. Like LittleImp said, the DPS or healer pulling extra mobs very rarely intends for it to go poorly. A tank "teaching them a lesson" always does.