See comments above.
I still disagree strongly with bring children for the mere fact of the aggressive crowds. When you get that many over-anxious BFers (some who will stop at nothing to get what they set out to get) in small areas, pushing and shoving WILL happen! Not only that but at that time in the morning in such a loud and combative environment it would, in my opinion, scare the crap out of some kids. I, personally, don't have any kids but from my years of experience with BF, it just doesn't sound like a good combinaton. But than again maybe your BF isn't as intense as mine!
In regards to your second comment, I strongly feel that during BF no one is patient (and oh I do try!!) and respect goes both ways. If your cart is blocking everyone (not very polite in my opinion) from moving through the isle than it deserves to be pushed a bit to make room!