Dealing with trolls in champion select

There should be a way to report/ban players who troll in the champion select when they purposely ban another player's champion and either take their position or decide to troll before the game starts. Because right now the only way to deal with these players is to dodge, loosing LP, being punished myself for 5 minutes and risking a ban for my own account. Punishing whoever "takes one for the team" instead of the players who do this on purpose. Perhaps a way of dodging by multiple people(3) reporting a player, or being able to appeal for the previous bans/lp loss because of this.
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