What can we do against champion select trolls?

context: mid hovers {{champion:145}} adc says he only owns {{champion:81}}{{champion:15}} and{{champion:145}} mid locks in {{champion:145}} adc threatens to troll https://i.imgur.com/undefined.png And this kind of behavior will not be punished, while the ones who dodge to save 3 other people a shitty game(in this case me), are punished. How is this fair? Don't tell me to play the game and suffer through 20 minutes in order to report this guy, we all know how good the report system is against trolls.
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