Report before a game
Let's say a player is being really toxic in champion select. This person decides they are going to troll or otherwise ruin the game for everyone. It's clear that you are about to lose a game before it begins. Usually it comes down to a player to dodge match making to save you from it, otherwise, prepare for at least twenty minutes of raging and trolling. For example, just a moment ago a player accidentally banned away the champion our support wanted to play. He immediately typed "F*** you" and decided he was going to pick Jax with smite and follow the jungler (the person who accidentally banned his character away) around and troll him. Some one dodged thankfully. My proposal, let us report this person in champion select and boot him out so he has to wait the 5 minutes. I'm sure it would take some trial and error to find a good system of doing that, but I feel it would be worth it.