Manners are not PC. Rudeness is not cool.
I try to live an easy-going life. That's kind of the way of things here in Hawaii. However, one thing that gets under my skin is bad manners - especially intentional rudeness. I'm getting better at letting rudeness roll of off my back. I mean it's a matter of letting someone else's actions control how I feel. Not good.
As a Scout leader one of my areas of teaching is helping my Scouts to have good manners. One cannot have good manners if one does not know what good manners are. Then, if one chooses, one may have good manners, or not.
There was an interesting movie a few years ago called Blast From the Past. It was about a man who was raised by his parents in a fallout shelter. Some pretty funny stuff. A quote from that movie that has always stuck with me is one I share with my Scouts,
"...He said, good manners are just a way of showing other people we have respect for them. See, I didn't know that, I thought it was just a way of acting all superior. Oh and you know what else he told me? ...I thought a 'gentleman' was somebody that owned horses. But it turns out, his short and simple definition of a lady or a gentleman is, someone who always tries to make sure the people around him or her are as comfortable as possible."