I can't wait for this to be implemented, if it ever comes.
Today, for a perfect example we wiped on Ifrit HM. People were complaining about stuns not being used to interrupt the explosions. At which point people started calling me a "failure" for not interrupting "enough" of them. To which I replied "Look, I use my stun as much as I can. Sometimes its resisted, sometimes on cooldown."
An argument ensued about there not being a PLD in the party which was "needed" to do Ifrit HM.
During the arguing, one of the DD, a Dragoon who was an instigator in the argument said, "I'm going for a shit until one of you turds leaves." and went AFK.
I left, because I am not going to sit there with someone AFK on purpose.
This was not fair to me, and I feel that a VtK option would be perfect in this instance.