Manners or Morons?

What happened to our youth? What happened to common courtesy?
I have to tell one story of lost manners.
I went to the movie theater in a near by town. It is nearby, because I live in the country and have to travel to the nearest town, if I want to see a new flick.
We don't go to the movies often, but it's alway fun and special.
One this particular day, it was a family gathering for the theater. There was four generations in our little group, ranging from 3 to 67. We were going to see the newest "Harry Potter" movie; this had become a yearly adventure for us.
So we get our popcorn, drinks, and goodies and find our seats, where we could all sit together. We eagerly anticipate the movie, it's really exciting for us.
The lights dim, and from behind us, I hear late arrivals.
The previews begin and so does the hell I am about to go through.
For the next almost 3 hours, the complete morons seated behind me have me grinding my teeth and raising my blood pressure.
There, apparently, are 3 generations behind me, as I can hear every word they are saying; they don't even have the decency to whisper. The kids, I believe two of them, kick my chair over and over and over. They slurp their drinks, even when empty. They scream, they cry, they talk back to their parents, without any discipline from the parents or the grandmother. I try all the tactics that I know, as in: turn my head part way to look at them & harmph loudly many times. By now they have gotten up a few times and hit persons in my party in the head, hitting the back of their chairs hard.
The movie breaks. The lights come up. I do not remember one second of the movie before this point. I was so angry that I wanted to leave, but my mother was really interested in the movie. I wanted to confront the morons behind me, but my daughter held me back. There is only 30 minutes left in the movie and guess what? The parents finally send the children home with their grandmother.
My question: manners or morons?
What are these parents teaching these children? I see the kids now-a-days, they don't hold doors open for senior citizens, they blantantly use foul language whenever, wherever they feel the need, they pierce their bodies in places I don't care to know, but what's up with the face? I don't want to see what I think is a piece of body fluid hanging from their top lip when they are serving me my lunch. I would not hire anyone with piercings in their face for my business if they had to deal with the public. And what about them not knowing what a belt is? They dress and leave half of their pants at their knees, what is that? And how can they walk or even run in an emergency?
Enough of my ramblings, I just want to know why parents are not teaching their children right from wrong, respect your elders, and do unto others as you would have them do unto you?
I am getting old, my views on life are getting ancient, soon you will see this blog carved into the walls of a cave, hmmmmm