To hell with you Riot, since this seems to be the norm in about a third of my games and I never seem to get feedback of action being taken. At least years back with the tribunal it made us feel like we were helping to clean up the community. League seems to have disentegrated into a complete joke, dominated by toxic snowflake children. I guess it's about time to follow the lead of my friends, uninstall, and start playing something different.
It's a shame, because you have a great product but are completely dropping the ball by allowing this toxic behavior to go unchecked. Ragequit, AFK, or intentionally feed - no problem. Type a word that is offensive to someone - ban.