That's not necessarily true. Kids have become more emboldened and teachers have had certain rights taken away from them creating a terrible environment. Many moons ago if I got sent home with a smack to the face from a teacher my dad would have beat the shit out me again. Now God forbid you touch a kid or reprimand him...the parents would be all over your ass.
One of the lessons kids need to learn... is that there are "consequences" for your actions. They should learn that at home and at school... those are the least painful lessons.