Jammers are useless
(from the link) ...kept the jammer in truck and activated during his daily commute in order to prevent other drivers from using their mobile devices behind the wheel...
I sort of sympathize -- today I saw a honk duel between two drivers, one which had the right of way and the other (who honked longer and angrier while gesturing -- I was expecting him to transform himself into The Incredible Honker) that was talking on a cell phone and not really paying attention. I just don't think a jammer would solve the problem since the other driver would just pay even more attention to his cell phone to figure out what was happening. Honker Smash Puny Phone!
Even so I don't think the $48.000 fine is proportional to the "crime". How much would be the fine to have in my car one of those Ben Hur or 007 devices that shreds other drivers' tires?