I feel as if it isn't taken seriously enough to stop people from doing it.
So riot i'd be very happy if you'd make a more severe punishment for leaving or going afk in ranked matches

I think it should start off as a 3 day suspension, then 5, then 7, and after that ban them i know it seems harsh but i'm tiered of losing elo because of other's just quiting or trolling my team

If you have a better plan post it here

Screw suspension, they'll just come back and do it again. Knock off 100-200 ranking. Don't ban them, just let them keep getting it knocked down.