How to Deal with Loss of LP in Ranked Due to AFKs

Everyone who has played ranked in LoL has most likely experienced an AFK/DC/RQ more than once, and probably knows how annoying it is to deal with. You are at a huge disadvantage and will generally lose because of it, making you lose LP, generally because you played a 4v5

And it is frustrating. Yes, it is possible to win a 4v5. No, it's not likely or often that you will. People ask for a loss prevented for AFKs, but you can win if you play well enough.

My Idea is this: Implement a system that provides a padding for players who have an AFK on their team, so that they don't lose as much LP, but only when they have an AFK for more than, say 10%, of the game, so that someone can't just pad his team's loss. "But people will abuse this to pad their own loss of LP!" Not if you make sure you know who AFKed, and don't pad their loss.

To me, this is a good idea. You make sure players with a DC on their team aren't as heavily affected as they normally would be, while ensuring people don't AFK just so they don't lose as much LP, as if they did, they would have to be AFK for enough time to give the other team a slight lead.