Just report abusive players. SE has a great track record of banning people for the smallest infractions of player conduct. For instance, a friend of mine had a 4 year old XI account banned for saying "My ass hurts" in a party chat. So whenever someone is being abusive just report them. Put the time, date, dungeon you were in and their name. A vote kick system would unavoidably be abused, and waiting for such a system does nothing in the meantime. Simply report abusive players and move on with your day. If they want to waste people's time and be abusive just report them and make all of the time they have spent in FFXIV a waste.