why does riot not punish for "ez" at the end of a good game

it's so frustrating , to have a bad game and try to keep yourself cool and chill throughout the game and then the enemy team puts in chat "e Z" or "EZ" at the last second before their victory screen comes and erases the chat (hell i sometimes dont even get to see who said it) and dont get me wrong i report every single time i see someone say "Ez" but i have never ever seen anybody get punished for it, not atleast the people i reported. it kinda suggests if riot even cares if someone has bad honors
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