Really dont get how these guys dont get banned? :S

Just played a game with a ww who lost his red buff to enemy jungle at the start he though he was pinged and told they were there but stayed blue Then tried to invade on their blue and dies and decides thats everyones fault but his. He then decides to walk down mid and top to feed and end the game Whole time he does this he flames and insults everyone Yet some how this guy wont get banned, no way this is his first time doing this either Really dont get how these guys get away with it
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