On the New York subway these days, they have endless automated announcements about anything you might imagine. Of course the result is that nobody pays any attention whatsoever.
Riding home last night about 10 PM, an announcement came on that said "Protect your belongings. Keep your cellphone out of sight." Here was the scene in my car at the time.
I realized that, in about a third of one car, I was looking at at least half a dozen people doing something or other on their cell phones. (You may have to enlarge this picture some to spot them all.) Not one of them paid any attention to the announcement. They all kept doing exactly what they had been doing. So I took out my own cell phone and snapped the picture. Good job busybodies!