I don't spank my daughter, but I will certainly grab her by the arm firmly and tell her, "Your going to stop, NOW". I used to give her a smack on the butt when she was younger, but as she has gotten older I don't. She's almost 5, and I think striking her would be humiliating for her.
But in the words of a great leader, "ALL options are on the table".
I agree with the 'spare the rod, spoil the child' idea. My wife and I feel that we don't need to spank our daughter because when she was young, we
did. The message was clear, if we tell you no, we mean business. If she was doing something bad, there was going to be a consequence. Same is true today, but we find we just don't need to physically hit her. In fact, we have tried to even stop raising our voices. But there are SO many freaking kids that we encounter....just rotten brats. No limits, and the parents just smile and enable the whole thing.
Theres a reason we send our daughter to a Catholic preschool, even though neither of us is Christian. We want her to learn about limits and being a member of a group. So many Seattle parents are teaching their children to be little narcissistic monsters.