We have them...fvcking electronic leashes...I view them as sort of a necessary evil, since most of my life, I commuted long distances, and since they became available, they have helped a couple of times in situations where I'd otherwise have to walk/hitchhike to a pay phone, or in times where 9-1-1 needed to be called to report a serious accident on the highway...otherwise, real PITA. I don't take calls when I'm in a restaurant, I turn it off in theaters and other public places where use is inappropriate, and rarely give the number out.
I have to wonder how we ever built America without them, because on every construction job I've worked, foremen, superintendants and leadmen spend half (or more) of their day on the dammed things working out problems, big & little. Before, they'd actually have to visit the job, or have a face-to-face meeting with someone to solve problems. Nowdays, pick up the cell and call them...from almost anywhere.
I support bans on them while driving however...people get on the phone, and go on auto-stupid.