Parents' Use of Physical Punishment Increases Violent Behavior Among Youth
Ohene, S., Ireland, M., McNeely, C., & Borowsky, I. W. (2006). Parental expectations, physical punishment, and violence among adolescents who score positive on a psychosocial screening test in primary care. Pediatrics, 117, 441-447.
" adolescents who were more likely to engage in fighting, bullying, and victimization of others reported that their parents engaged in corporal punishment as a disciplining method."
in other words, using violence to teach somebody a lesson, change their behaviour etc made them worse, not better.
and yet getbig is full of morons who grow up watching action flicks and thinks "kick his ass, that'll teach him a lesson!".