Never really thought of this.
I'm 29 now and at the age of 20 I made told myself I'd never do the following: use my phone while driving, drink and drive (even if I had a sip), and listen to music really loud. It just wasn't worth it.
To this day I've stuck to that rule.
Honestly, for most people I don't see this having any effect. I know people who still text and drive even though they can use the hands free features of their car/device.
I rarely get calls, texts, or e-mails that need to be answered right away. When I do, I simply pull in somewhere, use my phone, and go back to driving.