Toxic teammates

There is a problem that some trolling and toxic teammates always intentionally ban their teammates' champions {{sticker:sg-janna}} Is that also common for you?{{sticker:sg-lux-2}} Does someone have a good idea to help Riot to reduce or control the happening of similar events? Those players are too annoying...(Just cannot endure that why we have to waste our time for their impolite behavior?) {{sticker:sg-shisa}} (No offense for everyone, just be a little mean to those intentional toxic guys)
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