I've met some "problem" children that would have gotten licks til they couldn't sit down if they grew up around the previous generations of my family. However, due to increasing awareness about and understanding of emotional, and mental issues for example, I've found that children benefit best when the structural figures in their lives (eg. parents, community, teachers, family friends etc) work together to find the problem and come up with a solution(s). In the States, I've counseled and tutored children that would have been physically punished without a doubt where they in Trinidad, but there, parents and teachers came together to find out what the cause of some of these problems could be and most of the time found processing disorders, ADHD, autism, ADD and the like. Other children had problems at home and/or in school, sometimes it was a combination. The difference in these children before receiving help in dealing with these issues and after just a month was like night and day. The difference was even greater when families, friends etc became involved in learning and helping as well.
Negative reinforcement through corporal punishment is a difference of opinion. In my opinion, there are countless studies proving the damaging effects and often short-lived results of corporal punishment on children and there is a very fine line many people cannot identify that leaves corporal punishment and turns into blatant abuse (although I see corporal punishment as abuse anyway). In order for any form of discipline to be effective, there must be consistency and some level of rules in effect. It is too easy for an adult to take advantage of a small, weak, powerless child and turn what would have been a premeditated light slap on the cheek into a "cuff down" or "buss mouth" for example. I'm sure many people have experiences of punishments getting out of hand due to the punisher's emotions, whether regarding physical reprimands or any other type of punishment that may border on abuse.
More and more people are beginning to understand that there is never a good enough excuse to give an animal licks, and folks are even beginning to identify other types of abuse for animals; believing that they all deserve a warm, loving home with a comfortable space to sleep, ample time and space to play, time and assistance from those accountable to teach and guide it or provide teaching and guidance from others, and suitable meals. Hopefully we will reach the day where at least such rights are universally accepted and fought for children as well.