take your screaming kids outside

I was in wal-mart today and almost from the moment I walked in the door I heard this kid screaming bloody murder. At first I thought that he must have gotten hurt, such was the volume of his cries. When the screaming went on for 5 minutes, then 10, then continued for the entire 45 minutes I was in the store, I was ready to harm the kid myself, and the adult in charge of him/her. You could hear this kid throughout the entire store, it took every ounce of willpower I posses to not follow those screams and tell the mother/father/guardian to shut the kid up or take him outside.
Back when I was a kid, we knew better than to make a scene in public. If we started to act up, and by this I mean the beginnings of a whine, we were asked "do you want to go outside?" the answer was no. We didn't want to go outside, because outside was a nice spanking. You behaved in public, you did not embarrass your parents by making a scene, whether it be in the grocery store, church or another adults house.
Now I don't think the parents are embarrassed, they will get pissy if you confront them about their misbehaving child, get indignant and angry.
Now given, I don't expect Wal-Mart to be a peaceful place, but damn, that was ridiculous.