Afk series loss prevention

I believe that if you are playing a ranked game and are in a series and someone leaves/goes afk that there should be a loss prevention for the summoners affected by this one person. There is currently a remake system that is in place which allows for a game to not count and end after 3 min or so if someone joins the game afk but what if someone goes afk right in the middle of the game? Not only does it ruin the game for the other 9 players but also ruins the series for one if not multiple players. I just feel that there needs to be something in place that prevents those few players from ruining the game because lets face it, anyone can afk at any given moment for any given reason it may not necessarily be because they are a toxic player. I cannot tell you how many times I've had kids in my game tell me that their parents are telling them to get off the game ergo ruining the entire match. Please riot, at least consider some sort of option. "Draven out!"