Autofill sound warning suggestion

Don't know where to post this but... here we go :D Please Riot, please add like a sound or something to the client, notifying people that they've been autofilled. I am tired of picking my champion only to realize that I've been autofilled right after I lock. Can we have tiny little sound notification that let us know that "Hey noob, you just got autofilled, be careful what you're gonna pick" . Thank you....
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