My daughter insisted I get a smartphone for the GPS, since I am directionally-impaired. The GPS is the only reason I like it.
So, I usually leave my smartphone behind. The stupid thing beeps and farts at me constantly.
I believe it is rude to look at your smartphone when talking with people. A bad-mannered dismissal, it sends a clear message: "You are not important."
When I see a babies and toddlers staring at screens, while their parents are fixated on their smartphones, I want to say:
"Talk and play with your children! Look around. The world is beautiful and amazing. Your kids need active outdoor play, reading and learn social skills. They need you to play with them, listen and talk with you."