Vote Kick in Champion Select (Ranked)
I'm sure there have been other threads on this, but I'd like to re-highlight the issue as we approach the start of another season. It would be greatly beneficial to ranked gameplay if there was a vote-kick/vote-disband option during champion select. People's biggest pet peeve is trolling, and trolling happens at all elos.
If someone decides to troll (e.g. picks a champion in a role that greatly reduces your chances of winning, or tells the team that they are going to feed/afk/disconnect/etc...) then a four man vote should be enough to kick them and force them to dodge the game. There can even be a dialog box to keep track of the reasons for the kick vote so that these pre-game reports can be tallied and monitored by Riot.
Another prime example would be someone using explicit, racist, or hostile/abusive language throughout champion select. Why should one of the reasonable players be punished because of a "toxic" individual? A four man vote to kick that player and disband the game would be excellent and would lead to higher quality solo queue games.
This type of system would begin to isolate players who are not beneficial to the ranked community. They would be forced to either change their ways or play other game-modes.