Ranked Lp with afkers.

Ok so im sure most of us have had that moment when were in ranked the games going decent and then someone on your team rages and afks or dc's or something like that and that makes us lose the game and it wasnt a fair game at all yet we still lose lp. so this is just my idea it might be dumb it might be good idk but what if the person that dc'd/afk'd lost the normal lp loss 15-20 i guess and everyone who stayed in the game doesnt lose any lp. the reason i thought of it is because me and my friend where duoing and 4 games in a row we got afks making us lose ALOT of lp and i mentioned to my friend it should just be lose prevention but then he said "then when your about to lose someone could just dc and then u wouldnt lose any lp" so thats why i thought of this let me know what you think about it. love you all :D <3