Seriously? Chat banned for pointing out someone was inting?

You have got to be kidding me. I get a 10 game chat restriction for pointing out someone was inting. This ADC WAS inting in ranked. TPing solo into groups of enemies to die instantly, running into groups of enemies and not fighting, etc. I wasnt even talking to this person, as soon as I saw them inting I muted them. Then post game the inter started talking sh!t and all I said was I wish the mute followed into post game. This person gets away with ruining the game for everyone and I get punished? Really?!