Autofill strike.
Carries of the world, unite.
Or toplaners, or junglers, or... Well, you got the point.
If you see the autofill enabled advice, please, don't queue. Switch to normal, or ARAM. Watch a movie. Read a book. Take the dog out. Even if you don't mind playing support/jungler, even if you actually enjoy it. Especially if you do.
Block the queue. Try to make it so that even less games start.
Having autofill enabled means less quality games for all. And the only thing it causes is that you will flame at the person who got filled as a role he's not familiar with, or if you're the one filling, you'll probably perform sub-par.
Show Riot autofilling isn't the solution, it's just the best way to create 90% negative experience and 10% practice in a new role.