When I usually do the Roulette Low, and somebody asks to kill every mob in the dungeon, I don't really mind, it fells nostalgic, going back and do things I was doing while struggling to get to lv 50 xD

Still, it happened to find rude people that would complain if a low level player wants the exp in that dungeon..

I was in a party with a Scholar who would ignore the low level tank and aggro everything because "come one I want to do T5 after".

I feel sorry for low level player, and I tempt to adapt my play based on their experience in the dungeon...
If a tank is new, as a BLM I don't use aoes or I sleep mobs if they are more than 3...