A slap across the face, in the long term, isn't going to cause any lasting damage, but one delivered without reason,particularly for something someone else did, and people will rightly get pissed. There is no reason to defend this practice when the solution (punish the offending withdrawer/timeout player only, and on their 3rd strike)is so obvious. Much like a player in a improper ilvl avg, the party will already be unable to enter the duty finder again, until the punished player is removed.
