I think that is extremely rude. I HATE cell phones. I can not stand it when some one is standing in line in front of me at the store talking on their phone. At least give the cashier some respect, they are providing a service checking you out. I also get mad when my wife gets on her phone while in the car with me and starts chatting away with some one else.
With all that said, I have no idea what I would do with out my phone. But I try to be as respectful as possible when I use it.
With all that said, I have no idea what I would do with out my phone. But I try to be as respectful as possible when I use it.