I think the button to join the ranked game queue needs a warning of some kind. Something along the lines of:
"Ranked games are for experienced players who are familiar with the strategy and tactics of the League of Legends. New players or people playing a Champion for the first time should try a normal game instead. Ranked games are definitely not for players who are going to spend the first ten minutes of the game trying to learn how to make their Champion dance."
Yes, I just go out of a ranked game where our Fiddlesticks spent the first part of the game trying to figure out how to /dance. And no, it was not a fun game.