You are walking through a building and you see someone you know. You are approaching each other at right angles. You smile, wave, say hi; invoke some method to acknowledge their presence in the universe. They responded weakly in the same or similar manner.
As you pass each other you hear them speaking so you turn and indicate that you did not quite pick up what they just said.
They turn and look at you in an annoyed manner, indicating that they are talking on the phone.
Sorry, I did not see the Bluetooth tucked beneath your hair.
I remember several years ago when these devices first became popular. I was in the San Antonio airport returning from a job interview. It was the middle of the week so there were a lot of business travelers. It seemed that just about half of them had Bluetooth earpieces. As they walked around talking on these things the little lights were flashing. What immediately came to mind is from Star Trek: The Next Generation, “We are Borg, you will be assimilated.”
I think we are well on our collective way.
Resistance is futile.