I mean-they will cruise right past you and not greet you if you say hello-and to them, that's OK
In fact it's rude. Nothing justifies that conduct in an adult or anyone else.
They remind me of those in-ear blue tooth devices for one ear to use for phone calls. They looked “cool” at first. Now they look dumb. Same with these things.
BTW, the day is very close where all of your electronics will be recharging while on your body. Wireless recharging is coming on with a vengeance.