Discipline???????

Has discipline become a thing of the past? Why is it that children in 2010 behave so harshly towards authority and rules. Whatever happen to children that are well mannered and don't talk back to adults. Can we blame the children's behavior on the parents and just let that be the reason they act out. Honestly I think the whole idea of just letting a child misbehave is crap!!!!!! I feel its the parents responsibility to teach a child proper manners and behavior. Don't worry, I do know that sometimes kid act totally opposite from how they were taught, but seems like nowadays they aren't even being taught how to follow the rules!  What do u think about a child's discipline ?