If Someone Threatens to Feed or AFK in Pre-game, Take a Screenshot and Send A Ticket to Support
Paraphrased from xX aZ3R0n Xx's earlier comment. Does Riot already have a system set up to handle this? You send in a screenshot ->they check the chat log -> guy is temp banned, and you have your queue dodge expunged. Seems like swift and easy justice. And IF it exists, why haven't I heard of it in the last 5 years?