Well, to be honest. That was kinda dumb on your part "can you stop feeding?". There is a MUCH better way of saying that. Like "can you please play safer?" or "hug under the tower" or "jungler please help bot and camp because they need help".
A Red made a post about this. They even said that it is quite foolish to say that. It tends to upset the players if they are truly trying.
But, obviouslly the Ashe is a rager, so don't get me wrong. They deserve a ban for that IF this is 100% the truth.
Point is though, you should have worded the question better.