As a culture, we (normally) embrace the latest and greatest technology. Why? Because if we don't, we miss out, we get left behind, and we don't get to directly reap the benefits of that advancement. Even if we can't afford the newest and best, it doesn't prevent us from lusting for that phone, that computer, that TV, self tuning guitar, etc.
But another effect that all this technology has is that it causes us to perform actions that aren't really "normal". For example, watch a person play a game on the Nintendo Wii and you may see a lot more stationary flailing and moving than you would expect a person to do.
The biggest offender though – Bluetooth headsets.
The world used to be a simpler place, where, if you saw a person carrying on half of a conversation while walking down the street, you could generally assume it would be wise to steer clear. (If they were carrying on both sides of the conversation, it was, and still is best to just run.) But now, it's not that easy. To judge the craziness of a person that appears to be talking to themselves, we must check and see if they have a Bluetooth implant dangling out of their ear – but that check is itself potentially dangerous, and needs to be done discreetly to avoid causing suspicion and potentially inciting a paranoia attack from an imbalanced individual. And even if they do have such a device hanging from their skull, there's no way to be sure that they're actually using it at the moment!
I propose that we phase this potential (and highly dangerous) situation out quickly. And the best way to do that is by shunning and avoiding anyone that uses such a Bluetooth device.
I'm pretty sure there's no other way.