QwkAg,
I agree & hear you, and I agreed with JCL earlier in this thread, as to supporting the rec'd. But, I really doubt banning hands free cell calls will happen in any state.

And, enforcement would be impossible: how would a cop know one isn't just singing along to Simon & Garfunkel, or talking hands free? Even if they could 'anti-gizmo' the phone not to work, what about the passenger(s)? Pull over, turn off car and then talk?

Ain't gonna happen. Same prob with the severe/deadly issue of texting. But, texting is potentially worse/more distracting than staring down the road while gabbing.
None of it is 'good' or helpful to the act of driving, but enforcement and acceptance is really the basic hurdle.
BR, YBFAM