[citation][nom]us_ranger[/nom]So what happens when someone has a concealed weapons permit and is legally carrying a firearm? Guns drawn from the police while being told to get on the ground?[/citation]
The first words out of your mouth when dealing with an officer is that you are carrying. The scenario typically plays out a lot better for you when you do that.
If there was some way to ensure that officers had solid probable cause before using the device, or a device like it, it might be ok, assuming there are no medical concerns. I'd like to see a lot more lab testing on animals for at least another decade before any kind of deployment. Get some chimps, dress them up, give them mock weapons, and zap them on a regular basis for 10 years or so, and then come back with the publicly released results. Sorry chimps, sorry PETA... but that's the way its gotta be.
When I was a Military Police officer, over a decade ago, we had plenty of reasons to treat everyone on base with the respect you would expect for yourself. The idea that the person I am dealing with could be standing next to me in the chow hall line the next day never left my mind and guided all of my decisions as far as treatment. On a deployment, that soldier I wrote a ticket to may save my hide, or I may be living with him or her in close quarters on the top of a mountain range guarding an antenna.
If I saw someone walking down the street, in one of those huge puffy winter jackets, the type you could conceal an AK-47 and a shotgun without so much as a tiny bulge, and it was the middle of summer, I'd feel very compelled to stop and talk with the person. I'd then base a search on the conversation, attitude, and body language before even considering a search. Almost nobody wore stuff like that in the Texas heat, but it did happen from time to time. It was also an open base, and every other civilian in a pickup truck had a gun rack too.
In short, I would never rely on a piece of technology to determine for me if I should do a pat down. I think it would have the same effect as seen with people who rely on cash registers and once its unavailable, they're clueless and can't do the math. Officers relying on such a tech could see a decline in their people skills and become too reliant on the tech, and end up paying dearly for it at some point. I think its a bad idea all around b/c those in charge of the officers don't have complete control of their officers and there'd be too many abuses that never got accounted for.