People who connect spanking and physical abuse really have no clue.
I'm not saying I endorse spanking, but come on people, a quick spank is nothing to a kid. It's ineffective as a means of discipline because it usually doesn't hurt, not because it teaches a kid violence or some other crap. In my opinion, it can't hold a candle to verbal abuse.
Unlike some people, I'm only willling to draw on my own personal experiences in order to judge something. And to me, spanking is nothing to worry about, let alone ban. As a little kid, I was never spanked in the traditional sense, that is, held over a knee and swatted. We're kidding ourselves to suggest that abusive parents need to spank children to be abusive, or that it has anything to do with it at all. True abuse is far more insidious and much harder to pigeonhole. Degrading your child. Humiliating your child. Mocking them like they are so below your level that they should be ashamed. Treating them like you don't want them. Not showing them love. That's what causes the harm, not a quick swat on the butt for screaming in the super-market. (Which I think is a very bad solution). The problems go far, far beyond the form of punishment the parent might choose. A ban on spanking will fix nothing, except maybe spare a few people from an awkward moment when a mother spanks a kid in public.
Sadly, you need punishment that they will remember and want to avoid. There's no way around that. The thing with reasonable spanking is that it's not enough of a deterrent. I can remember not giving a crap if my mom spanked me or not. I sure as heck preferred it to spending the day in my room or picking green beans until my back ached.
In my opinion, spanking is overrated in every sense. Some well-meaning but stupid kooks in the government just really have no idea how kids tick. This isn't a matter for the government, it's a matter for the family.