Rude People Suck

So I was at the post office today after a long day at work. I do not advocate or recommend anyone going to the post office at 4 in the afternoon, but today this could not be avoided. There was very limited parking with people in line with their cars waiting to go inside for whatever reason. So..I am one of those people waiting to get a parking spot, when this douchebag (sorry had to go there) gets in his car and rather than be considerate and go ahead and pull out of the spot and go on about his day, decides to start a conversation on his cell phone!! What is up w/ people and their cell phones? Do they have to be so much into a conversation that they have to be oblivious to everything around them. Can someone help me out with this? I was steamed.