Honda has developed a crime rate detecting GPS that will search through local police records to alert drivers in real-time if they ever happen to drive by high crime areas...
Look for it to violate US anti-discrimination laws for only going off in certain demographic areas. I can imagine some places where you'd have to turn the damn thing off because it wouldn't shut up.
Just think though--once we all get our Real ID chip implants, and once all our guns are registered in a central database, and once all our guns are made "smart"--replete with "Only One"-controlled shutoff switches--what a wonderful world it will be!
GUN OWNER WARNING! GUN OWNER WARNING!
Sounds like "probable cause" to me...