Show A Little Kindness - Off Topic

I am going to go a bit off topic in this post, please forgive me.

I was in the grocery store today and the person in front of me in line was on their cell phone during the entire transaction with the cashier. There was no greeting - in fact, the cashier - the person - was totally ignored. I find that, at the very least, incredibly rude.

Yes, I know cell phones give us near instant and constant contact with others, but it does not have to mean you need to answer every call no matter when it comes in. I see people nearly everyday be far more involved in their conversations on a cell phone than with the person in front of them such as this cashier. What does this communicate to the cashier? At the very least it tells them they are not important and could communicate they have no value.

Isn't there something wrong with this picture?

A cell phone, to me, is a tool for communication with others, but it does not give one permission to ignore others. There has to be some degree of cell pone etiquette. People have to be valued when they are assisting us.

I will get back on topic, now.