$25 isn't affordable? More to the point, you don't need Bluetooth for hands-free. You can get an earbud-and-mic set for about $5.

true but when i bought mine you couldn't get anything worth using for less than $100 and my phone wouldn't take anything but blue tooth (the Motorola rive is one of the poorest designed phones i have seen)

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...can't do anything if I didn't see it myself.

What? How do they solve crimes? "Sorry, can't investigate this multiple homicide, I didn't see him do it."

Try overloading them with paperwork - since it is, technically, an offence to withhold evidence of a crime, try sending them a signed report of every incident you see and "cc" it to a local judge or newspaper.

This is something I've wondered about- at what point does a crime become significant enough that the police will still care about it after it has finished taking place? Clearly "he's not murdering anyone right now, not my problem" is on one side, and "he was parked here for longer than the parking restrictions allow, get forensics in" is on the other.

I don't think there's much you can do about people on their phones while driving, but if they are right behind your car then I totally don't suggest tapping your brakes to make them take notice of you because that would be very irresponsible. If you're on a bike (as your image suggests).. get out of the way. Either go faster than them and get way ahead, or pull over/slow down for a moment to let them and their dangerous ignorance past, it's not worth the danger of being anywhere near them

I recently saw a car with a ghostbusters-esque array of cameras and stuff in the back, have no idea what it was for but it made me want one of those scrolling character-LED displays with preprogrammed messages like "Get off your phone" or "Stop tailgating me, ***hole".