AFK punnishment development

I think when a person is afk or leaving the game, the punnishment should be that you loose doubble or trippel the LP.Your teammates will then split this extra LP which I think this will increase the health in this game. This way ragequitters will know they will loose more by leaving which motivates people to stay. It's also fair for people who get these leavers in their team. Sometime your internet shuts down and you can't do anything about it but then you teammates will loose less for your problems. The standard queue ban/ delay punishment should also be left.