Yes, I have. But so what?
But even if not-- does fear of the opponent scoring really justify winning 10-0, 15-0 or by some ridiculous score?
And if you lose points for giving up a shutout-- is it really that much more important than grinding a bunch of 9/10 year old opponents into the ground? Doesn't that on some level make you feel kind of bad? Aren't there more important issues at play than just winning? If your parents/coach think it is all about the win or points, then they've lost perspective.
I agree that no parent of an opposing team will forget it, which could easily cost you in ways you don't see.
But beyond this, don't you have some greater responsibility to teach the game in the right way?