I'm one of those rare people who don't have a cell phone & never had one. When they became popular, the first thing I predicted came true (unfortunately)...that idiots would dial & text while they were driving & people would be maimed & killed. And other idiots who drove passenger vehicles would also cause injury & death (like the Metrolink conductor in Chatsworth who killed 25 passengers in 2008).
A few years ago, I had a first date. During dinner, she answered her cell phone & chatted at least 4 times. When I didn't call her for a second date, she called me & said, "Why haven't I heard from you...I thought we were getting along very well?" I said, "If you really don't know, you're even more stupid than I thought."
Of course, I'm not entirely blaming the phones, but they do allow & encourage people to be rude. And stupid.