How can we fix league. I.E. Get rid of the toxic, afker's, ragers, etc.

So I have been playing league for quite a while now (End of Season 1). A lot of my long time friends, or friends that have been playing since pre season 1 (beta) or even a few since season 2, have noticed that League is getting more and more toxic as the seasons pass. There are more people raging in chat and just down right nasty to other players. Its disgusting that these other human beings lose the sense that its a game and being positive towards one another is much more beneficial. I personally have watched friend after friend leave league of legends for less negative communities or to games where chat is disabled or has features to where they can get info across using a multitude of pings and not have to chat.

My question is, can we throw out some ideas for riot to help us tone down the nasty toxic players, and to make league a little bit more of a fun environment again? I get that there will always be ragers and afker's and we can only punish them so much.. but there has to be a way to help weed them out. (yes we all have our bad days, but I'm talking the players that do it constantly, the players that make you sick of playing and make you close league and watch puppy videos the rest of the day).

--(one more side question... ideas for loss prevention when you have someone dc or afk on your team that is trolling or just plain knew they had bad internet... [could riot have you lose only half the lp you would have lost or something along those lines? whilst the player that dc'd or afk'd loses double the lp and has a 5 to 10 game ban???] Just ideas in general for both of these would be appreciated.)--

As a long time lurker and not complaining about the toxic players. Please can we get some attention on this subject and maybe atleast throw riot a few good ideas???

Thanks so much for your time, See you on the Fields of Justice! -Messiah Uberwise