If you have the ability, run something like plays.tv or similar. Record your matches. Screen shot chat. Send a ticket to Riot support with any of this evidence, a member of support will look into it.
I hate to say it but I only see two possible courses of action on our part...
Quit League of Legends or flood support with tickets providing evidence of these trolls.
I'm tempted to setup my own Youtube channel, call it LoLNameNShame where I post my own matches and and matches recorded by others, clearly showing obvious trolls.
If we can pressure support into being overburdened with tickets, with factual evidence, Riot will be forced to find an alternative to using manpower (money) to solve the problem or possibly dedicate a portion of their manpower to spectate random matches or something similar. Maybe set the tribunal back up? I don't know but the current system is simply not working. Dynamic Que is not helping. Solo Que used to mean one troll 4 ff votes. Now they que together.