While I don't get it, I can't blame it solely on kids.
I'm a supervisor, and I'm constantly chewing on adults who can't seem to get it in their heads that texting in the middle of work is verbotten. These are late 20s, through 40 year olds, and almost exclusively women.
My boss gets on me to get on them, and I ask them the dire nature of their important texts. Usually, stuff along the lines of what they're eating for lunch, or "I'm bored".
It's a ******* phone. You have something that important, call.
"But I'm not allowed to call while I'm working, Benny."
Oh, forgot, you're right. But guess what?
YOU'RE NOT ALLOWED TO ******* TEXT, EITHER!!!!