Ban from 1 report?

I just wondered since one of my friends got a 14 day ban and only being reported by one person nothing bad said in game but post game got a little heated from both sides and i didn't seem like the enemy that was as toxic as my friend got banned but as said before my friend who only got reported by him and that we know is even possible to get banned from this one report
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Offensive Spam Harassment Incorrect Board