Banning an allies preferred champion in the new Draft Pick champion select.

In the new Draft Pick champion select when you're allies ban you're preferred champion. That should result in a warning since its just rude,selfish,negative. -Example: on PBE one guy wanted to play Jhin but forgot to set him as a preferred champion and I did,so he asked me if he could play because he didn't play him at all and I said me neither and he got the banning turn and banned Jhin selfishly. I think that should result in 1 or 2 warnings and after that a punishment to not be able to ban for a few games and if that continues not being able to ban for a longer time.(forever if needed) or at least make it so just 1 guy bans again so there is less chance of that happening again.
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