I'm gonna say something unpopular: I don't like to rush.

[Kiarin]

Not tanking mobs that dps or healer pulled in is wrong and rude, but pulling them is also wrong and rude, maybe even more.

If you wish to go faster, for the sake of all good n' holy, say it. The party, once again, should be a democracy. When you express an opinion ("faster/slower"), it can be decided together if majority is pro or contra that.

I've seen multiple times how a sprout tank was doing his best with middle pulls and then died because his teammate got cocky and pulled more. When you descend from the shining reaches of Expert Roulette, you will see a lot of new players like that.

And, once again:
- There can be a tank/healer who finished E8S solo, knows all his CD's and XYZ of every mob in a dungeon, but simply doesn't want to go fast.
- And he has all the right for it.
- He isn't even obliged to have and/or present any reason for this wish.
- But! He must know a collective decision of the party on the speed and, if it stands against his wishes, either adjust or leave.

[Nestama]

Not tanking mobs that dps or healer pulled in is wrong and rude, but pulling them is also wrong and rude, maybe even more.

I'd say it's tipped the other way. Choosing not to tank extra mobs pulled by the DPS or Healer can/will cause a wipe (since the DPS and/or Healer are most likely AoEing the first pack, which means they're now on the extra mobs aggro table). Pulling mobs for the tank can go in two different directions, though. One can cause a wipe, but will hopefully show the DPS/Healer who pulled that what they did was wrong. However if everything is killed, then the tank now knows they're with a group of people who can handle/prefer big pulls.