If they divide the plane into CELL PHONE ALLOWED AND NOT ALLOWED sections, how would that work?

Would standbys be forced to sit in the section that allows CELLPHONES? (Because they did not get a reserved seat earlier. Or what if you were put in a NO CELL PHONE row, couldn't you hear the person talking next to you in an authorized area?

Reminds me of the smoke I had to put up with in non smoking (in airplanes 15 years ago) from the next row- which allowed smoking.