Aggravated is a fairly charged word. I don't think universal cell phone use leads us as a society to healthier communication. My wife (a Fairbanksan, btw) relies on hers to call me when she's on her way home from work in Manhattan. We get many chances to talk about stuff, both important and inane. Everyone ought to have personal space that is separate from the buzz of 21st century life. Not having a television and not having a phone is how I achieve this for myself. Other people might have a particular personality makeup that either achieves this in other ways or does not require it. That's ok too.

I guess I can't really complain too much about being considered odd for not having one. I must admit I relish being seen as a unique person or even an eccentric.
I suppose emergency originally carried a more mild meaning, something that's come up (emerged) unexpectedly. And yes, a helmet is essential... it just might obviate the need for a cell phone! Besides if you line yours with tin foil, it will keep the cell phone radiation out!