To those who say riot does punish trolls

I've had a lot of arguments with people who claim riot punishes trolling and not saying mean words to people. Optimistic people swear up and down that riot will review vods and punish people who griefed obviously in their games, and I've mentioned that if riot wanted to find trolls there literally entire youtube series where you can find clips of people griefing and nothing ever happens to them. Well to further point out examples of how pointless riots anti-griefing system is, if you watch TF blades latest vid he gets a yasuo who rages at someone... feeds... goes afk, comes back and feeds some more. End of game TF blade says he can tell from match history the account was boosted or changed hands and reports the guy, and says in ticket he's sending vod. (IDK if he ever did or not, but you can see the game on youtube)

Anyways, this player has since that game, played 37 more games. Several of them with similar, very suspect scores. Now I get that there's a problem with establishing a standard of reasonable expectation in this game, since a ton of its playerbases playstyle is indistinguishable from trolling. But if a clear cut case of flaming, afking and inting all in one game, with a streamer recording and broadcasting it, isn't getting punished... then wtf is? Just that poor sap that gets fed up with the ragequitting yasuo's and eventually snaps and goes off on him get the punishments it would seem.