I'm a licensed amateur operator in Florida. Regarding 2-way, ham radio, and cell phones, in Florida a law was passed some years ago that prohibited using scanners in cars. However, there was a clause that exempt FCC licenced radios, including ham radio. It is based on the possibility of restricting ham radio from participating in providing emergency communications in times of disaster. Law enforcement sometimes did not understand the exemptions, so the FL Attorney General issued an opinion letter to clarify that hams ARE allowed to operate communications equipment, even if the equipment is capable of receiving public service frequencies.
Many other states have the same opinion letters regarding ham operators. I always keep a copy of the letter in my vehicles for back-up along with a copy of my FCC license.
It's important to stay on top of such bills, as several conservative driven state and local governments will try to restrict or govern everything they can think of by passing reduntant, rediculous laws. Sometimes these conservative state and local governments try to govern communications, but quickly get slapped because of federal preemption.
As for cell phones, I think eventually the US Supreme court will overrule these restrictive laws because the laws probably already exist. A person is already responsible for their actions especially if they cause a traffic accident or break a driving law while using a cell phone or any other device. Besides, I can't imagine the burden and impact on law enforcement, being required to arrest everyone in sight while using a cell phone. As for ham operators, safety and common sense usually prevails so we just don't drive around all day talking on or rigs, espeically in an RV. Communications are typically brief, and most hams tend to use hands free devices instead of mics. Amateur radio operators have been operating 2-way radios from autos for 60-80 years.
There's also an issue of freedom of speech, and such laws tend to squelch our First Ammendment rights, even if it's involving 2-way radios or cellphones.
Next, we'll probably see bans on GPS screens!