I have one question about this technology. A lot of people use their phone to stream radio or play music through the radio. Why should someone doing the equivalent of changing a radio station be punished when someone who crashes while actually fiddling with the radio doesn't get the same treatment? Just because it's a phone?
I'm all for stopping texting and driving as a distraction, but a smart phone is a multipurpose device. If we're going to punish someone changing radio stations just because they're streaming it on their phone instead of using the knobs and buttons on the dashboard, then we have a bigger problem being created here. Distracted driving is distracted driving, and we're getting dangerously close to invalidating amenities cars have had for years in our pursuit of ending texting and driving. Where do we draw the line?
Personally, digging up your phone records, which prove beyond doubt what you were doing, is still the right way.
On a side note, the province of British Columbia has government issued car insurance. They're giving people rebates for installing phone jammers in their cars...which means they're creating a culture of people who won't want to carpool, in direct opposition to what they've been preaching for years. After all, who's gonna want to ride with you if they can't use their phone just because you want a rebate?