I agree with Coach Mahoney. If the Q is under center he's going to get killed unless the "A" Gap rule applies to this scenario (It didn't in my league).
Here's how I defended it with the Q in the gun at 8U, where I was basically daring them to throw.
On the wide stack side, everyone is in a gap between linemen. If they block down on "bring it over", the man on the end will make the tackle.
On the two receiver side, there's a defender on each side of the stack. I usually have the inside man go for the pick.
Next to the center, I have one defender on each shoulder. The defender that's on the C's right shoulder (our left) makes sure the C doesn't go out for a pass. The other one gets after the QB.
I also had one guy who I floated around. Usually, he was positioned to where he could make the tackle on "bring it over" if they blocked out or where he could catch a lazy pitch.
That's my two cents... now to see how the rest of you defensed it.
Coach Terry
Fight 'em until Hell freezes over, then fight 'em on the ice -- Dutch Meyer