curbing lp loss for disconnects/afks

i dont play ranked all that much, its way to frustrating constantly losing because of afk/disconnects/trolls. i do my best, i cant always carry a team. but even when i do do well in a scenario like this, it can be hard to make up for that missing player. i really dont think its fair for someone to lose lp when they are doing well but not well enough to overcome a missing integral part to the team. i always see people suggesting loss prevented for afk/dc's. i understand why thats a bad idea, someone will just leave to trigger the loss prevention. why not instead make it so that person loses all of the lp for for the team. add up the lp the other four (or less) members would have lost, and have that be their punishment. how many times will someone take the fall if they lose that much lp? if that seams too harsh, just half it. it would still be enough to keep people from starting a ranked game that they cant finish.