I do not yet have a tank but when DRK comes out I will have one, at that time there will be no speed runs unless EVERY single member of the group wants it, not if one person wants it and not if two people want it etc. Everyone must be in agreement. If no such agreement happens then no speed run, simple as that because no-one when joined the queue if for example in DF (unlike PF might) agreed to a speed run prior to joining so they should not be punished or picked on when never agreed to it beforehand.

The individual has same right as the others opposed to that individuals choice in my opinion so unless the entire group is in agreement then it won't be a speed run if I am tanking it. Mob rule and bullying will not be accepted in groups I tank for of which you can probably kick me using that mob rule but I will not betray my own principles in such situations and would rather be kicked forcing you to find another tank instead of being complicit in bullying another player who never agreed to speed run before entering the dungeon.