Cops....they get laws passed to exclude them from complying. Around here, they drive single person in carpool lanes...text and use hand held cell phones while driving, run red lights and stop signs, failure to use turn signals....support gun legislation then go to the legislature to have them "exempted" from the law (seriously).
I read last year accidents and deaths caused by distracted driving, specifically cell phones and texting, surpass drunk driving incidents of the same result.
The cell phone companies have good lobbies...and lots of cash to spread around to "campaigns", so you won't see any real enactment of anything significant.
You must have experienced getting off a freeway at an off ramp, moron 4 lanes over does a 45 degree, no signal, no looking, dive to that offramp right in front of you.
GPS says "turn right here", so they do.
Same morons that drive double high tour buses under short bridges because the GPS said to....and the warning signs must be wrong.