I Would regret this, Ban is a remark of Punishment due to some IN-discipline actions in the game. If someone gets banned and gets unban himself how would realize his mistake,Ban is a Punishment, Punishment is given to realize what mistake we have done. He only takes advantage of it and don't realize and keep repeating it every month. As, Steroid said what would other 4 players in the team do if player leaves PUG? it spoils the whole gameplay and interest of players. this may lead to reduce of population in PUG. If this rule would be not taken, I would suggest that only Reduction of ban period may be applicable once per month(Reduce the time of bans themselves once per month). Time is enough to realize one's mistake. This is from my side and there will be more posts apposing the thread.

Thanks,
Mechanic (Mechy)