These same devices also cause people to not look WTF they are going. I can't tell you how many times I'll be walking on a sidewalk (keeping to the right) and some numbskull is walking toward me with their head down reading and texting on the phone. I have, on more than one occasion, walked directly into said numbskull practically knocking the phone out of their hand.
We're supposed to be watching out for these idiots?
There are studies out now that have found that the use of devices to look information up is dulling our abilities to think on our own.