Uhm, no actually, I did not shut my ds off. If I was that kind of person, wouldn't I have shut off when you were beating me with your 6 on 6 team? I don't shut off during battles. I don't mind losing. (I believe my record is not wins 6 loses 14).
If I had a camera, I would have taken a picture of the blue screen of ds-y death to prove myself, but all the batteries I have are dead.
ALSO communication errors can happen from bad connections. It could have been yours or my connection. Not to mention, there are communication errors that happen that I can't explain. Haven't YOU ever had a communication error while doing something like trading? Where there would be no benefit from shutting off? If not, then I suggest asking people who trade a lot.