If texting and driving is banned with the fines being expensive and multiple tickets resulted in a driver license suspension similar to driving without insurance, that requires an sr22 filing
http://www.sr-22.info there were be no need to have electronic gadgets to block it. Divers will learn to pull over. Instead of blocking texting, it would seem, companies should find better and easier ways to make phones and devices able recognize voice and convert it to text.