@Grey WolfI'm more of an anti-spanking perspective. In certain cases, it is necessary, yet those cases are fairly restricted (a child ready to chase a lost ball into oncoming traffic), as the shock teases an immediate lesson about the inherent dangers.
Yet, there are some parents who habitually strike their kids, not because they're inherently bad or evil, just because that's their only alternative, as their entire perspective is "It's either my way, or the highway," which I heard repeatedly growing up.
Meanwhile, my father started out using physical punishments (forcing us to stand for hours, or holding heavy booksβunder the threat of a spankingβyet he eventually gave that up as ultimately unproductive.
Instead, he switched to lectures, each time telling us, repeatedly, how disappointed he was in us and in our actions. During lose episodes, I'd much rather take a beating, as even that is preferable to those disappointment lectures.
That said, my mother had a standard response when we misbehaved in publicβmainly during church, as my father was a Naval Chaplainβso she'd squeeze our little finger, which was painful enough, yet trying to pull you hand free was vastly more painful, as was squirming in your seat.
What was worse, is that her little fingers were fairly misshapen (with her joins jutting out at odd angles), which invariably made us wonder what those punishment would do to our own fingers.
So, both of the punishments were quite simply way more effective than paddling, spanking or any physical punishments. Though I still approve of those impromptu punishments to protect younger children.
As far as the supposed "bad" children, I've also believed that problematic children are best dealt with by letting them face the consequences of their actionsβeven when that includes letting them failβor if they storm out of the house, stating they never want to speak to us again, letting them do just that.
For my and my wife's part, our kids (actually her sister's kids, who her mother kept trying to manipulate them through guilt), when they threatened to call social services on us (a common comment on the time, since it was repeated on television shows fairly often), our response was "Fine. Go ahead, in fact, we'll make the call for you. But, once you do, you're on your own, meaning you'll go into foster care, likely bouncing from home to home. So, good luck with that."
You've never seen kids backtrack faster than that.
On the other hand, I'm also a believer in "addictive personalities", as I've seen it time and again, as some people are simply prone to additions, while others (my natural family) seem impervious to addictions. My brother, for example, smoked for years and drank heavily to keep up with his wife, yet when she fell during an argument, and everyone accused him of striking her, he quit both cold, never resuming either one.
Yet the other part of the 'addictive personalities', is that most people will actively search for their particular addiction, trying one, after another, after another, after another, until finally settling on their specific preferred addiction. And after that, they stick to that one addiction, rather than returning to any of the others they'd previously abandoned.
Thus, with our kids, we also had the whole 'addictive personality' lecture, again reminding them that, if they tried different things (we raised them as most Europeans did, where we introduced them to 'controlled' drinking at home, where we could monitor it rather than most American kids, who once they reached legal age (for us, first 18 and then later 21 to drink the exact same things we could legally drink the week before).
Needless to say, after trying that, while they were at home, waiting for us both to get off of work, they tried finishing off the open wine bottle, and it was clear they'd gotten drink.
So we then physically locked the liquor cabinet, but the experience had so terrified them, that they were always incredibly careful with all addictions afterwards.
Which brings up the other issue, as in most cases, most children labeled as "bad", are actually suffering from mental illnesses. So in those cases, physically punishing them, only confirms that view, so they then take it to hard, assuming they'll always be bad and they'll then double down, never holding back.
So, long story short, labeling kids as being "Bad"βespecially if they're suffering from mental illnessesβalmost never works out.
Yet, in the end, I followed my father's tactics, relying on lecturing the kids, which did keep them on the straight and narrow.
In short, there really are no 'simple answers' to such problems, as they're often a combination of several different, overlapping factors.