Ranked and AFK's

Hey Riot , I really hope ou guys will actually read this . I would like to talk about afk's in ranked games , I've just started playing ranked and I've already got 3 afk's in a week , from bronze to silver , I think that when you're in a ranked game with an afk , you should be able to quit or stop the game . 'cause it's almost impossible to win a 4v5 . I feel like there should be a button to quit the game when there's an afk or just a message that will tell you that you will NOT lose lp from this game ... since you can not actually show that you're worth more . Ofcourse with that there should be atleast a lil' punishement for the ones that leaves like 30 lp in less or something like a small ban 'cause you're not supposed to just quit in a ranked... But ya... that's my thought and I'm pretty sure a lot of person would agree with me on that . Thanks for reading :)