well, yes, I must agree, too much respect is really sometimes as bad as not respect at all. The golden middle way is in between. I don't think we must consider older people always to be right, even if they are not. Everybody just has to have his own values, and basically they come from family. Children and teenagers are people, and adults make great mistakes just wanting them to be respectful. There must be a reason to have respect. Talk, discuss, explain what you think, tell them what you want and , most important, tell them why you want it. Sometimes parents think it is enough just to give orders and that's it. Why not explain? Why not discuss possible consequences, if it is not done the right way? And if teenagers don't understand you, maybe it's not because they are bad, but just because you didn't find the right words? Try again. There is no one recipy for everybody. So , if you have a problem, you must try as much as needed to find the way to your teenager's ears and heart. There is such a way, always.
And if you don't , there are others, who always will- the other teenagers, the internet, the movies... without your help your teenager can get the wrong message.
"To know nothing is bad, to learn nothing is worse."