Pmags,
I'm certainly not advocating that everyone should carry a safety device. I'm firmly in the HYOH camp. I don't care what someone takes with them, what clothes they were, what color their shelter is, etc. I do have my pet peeves in the backcountry. Late night gunfire, aggressive dogs on the lose, etc. I just think they are a valid choice for those who want them.
I also like to get away from contact. One of the big attractions for backpacking. I work on a computer for 45-60 hours a week and am oncall every fourth week. And when I'm not oncall I still get called on things that I'm the SME for. So I do want to get away from that and backpacking is just the trick
After using a SPOT for years, I switched to an inReach earlier this year. I think the 2 way communication will be helpful in a non-911 situation (I've had one these when I hurt my knee and bailed to an alternate trailhaed) and even in a 911 situation. So far, I use it just like my SPOT. I send an OK message when I get to camp. My wife is the only one with the contact info and she's only sent a test message.
I leave a detailed itinerary (and now include info on alternate trailheads). But what I found great about the SPOT is I'm not as tied to the plan. If I wanted to change my plans and take a different route, I could. I'd change course and send 3 messages as I headed the new way. Now, I can simply send a message saying where I'm going although I haven't done that yet. But I like the ability to think "Hey! I wonder what's down that canyon?" and go off trail/itineray to find out. For me, it's even more freedom. After all, what good is leaving an itinerary if you aren't going to stick with it?

