This cannot be generalized. Some kids can be reasoned, and they
respond positively to reasoning or verbal rebukes. For these kind
of kids, there is no need for any corporal punishment.
However, some kids simply cannot be reasoned and/ or cannot be
bothered with verbal rebukes. For these types of kids you gotta
speak their language... The Rod! (Kids that run around inside the
MRT inconveniencing and endangering fellow passangers are probably
the ones that understand only the rod, but whose parents firmly
subscribe to the "No Cane" rule)
It is dangerous to argue for or against the use of the rod, without
considering the character of the kid(s) concerned. I think its more
important that even if you do cane your kids, you do it not out of
anger, but out of a desire to make the kid into a better
person.