How about the guy I hiked with a few weeks back. The guy became very ill towards the middle of the second day out. He was resting on top of a mountain and told us all to go on, he would be OK and catch up later. He did not get to feeling any better and had to call for a shuttle. I think he got dehydrated, but I'm not a doctor. Anyway, sure, we would have gotten worried about him and eventually got him off the mountain, but because he had his cell phone and had reception he was able to call a shuttle and walk the short distance to the road and get back into town to recoup.
I don't leave my phone on at all times, but I definitely carry it. I call in to the wife and kids every night, if I can. I hurt no one by doing so. If I am around strangers I even go out of sight to make that phone call. It's just common courtesy. Common courtesy would go a long ways towards solving most of the earth changing issues all of you like to argue about here on WB. Think about it!!