More severe punishment for "Feed and Leave" afks

I hate afks just as much as the next guy, but what really frustrates me are the people who go very negative and just quit. Leaving the rest of the team to not only be 4v5 but 4v5 vs a fed team (or at least a few players). Now the chances went from slim to next to none in terms of that 4 winning. And they take full loss penalties for it when they eventually lose. Because it is intentional, and not technical, punishment should be more severe. Also, those who rage quit most likely are not going to jump right into another game. So any lockout queue timer imposed on them seems redundant.