I don't know.
Is there anything that screams "lower caste" louder than walking around with one of those stupid bluetooth gadgets stuck in your ear?
To be fair, many states now prohibit cell phone usage (including texting) while driving, and this is one way to get around that. That being said, those self-important pompus assholes who stand in line at Starbucks, the grocery store, restaurants, etc., with that shit stuck in their ears and carry on entire conversations, oblivious to those around them that are having to put up with said jerk?
I have one and use it in the truck, or when I'm playing poker to listen to music on Pandora. Other than that, pretty much never used.