Dan-
None of the legislation that's been introduced thus far has been around banning cell phones in their entirety (imagine that - the cell phone industry would never stand for that).
The legislation is around the use of the phone in a car - either banning it's use entirely within a car (which means any showing of the phone, either when stopped or while driving, would merit a ticket), or banning the use of the phone only while the vehicle is in motion.
Your examples don't fall under either case. People would still have phones - they just wouldn't be able to use them while driving, or in the car.
I know everyone here is conscious enough to keep their eyes on the road while driving, regardless of whether or not they're using the phone. It's the other people I don't trust. That woman I mentioned above - she wasn't even LOOKING at the road. She blew right past - and if I wasn't on the ball, if she wasn't moving as slowly, and if my vehicle didn't have such great brakes - something BAD would have happened.
It's unfortunate - it's like speed limits. In theory, there shouldn't be one. You should be able to go 100 MPH on the highway, under certain conditions (empty road, good weather, daytime). The problem - some people are jackasses, and they need to be controlled. So in comes a speed limit, which makes everyone suffer. Still - the majority of people are safer, as a result - because some people need the limits in order to reign in their bad driving and poor judgement.