2 words - Parade Belt
My mates dad used to welp them with his old army parade belt (big black plastic strap, with huge silvery buckle) and they still acted like muppets.
When I seen these kids in TV programs kicking the shins of their mums, breaking everything and going into tantrums, then the mother going "Stop doing that, it's naughty" I thought: If you just grab him, bend him over your knee and skelp the **** clean off him, I guarantee he'll drink his juice and be a momma's boy forever.
Even though I have very little experience of children, I say they need to have their minds occupied, rather than firing them in front of the TV or playing a games console, have them help out around the house, doing chores etc. that way they can appreciate the effort their parents put into raising them!
But Yes to the OPs question, disciprin is necessely. Just look at the Army - most squaddies begin as little more than crap on the end of your shoe, at the end of the day they end up as an effective, organised force. (even if they are all raging alcoholics off duty
) It certainley shaped up my brother, my step father and a lot of mates I went to school with.