I didn't intend to say it was good or bad. My point is more that technology won't eliminate the kind of thing the OP suffered, because you can simply just hang

I didn't intend to say it was good or bad. My point is more that technology won't eliminate the kind of thing the OP suffered, because you can simply just hang around the area in a police car or ask the neighbors. It may make it more efficient, but neighbors have been calling the cops on people quite all right without cell phones. The main issue is the nature and cost of the legal system if you are accused, which is less privacy and more protection.