Susie Kessler couldn't care less if she embarrasses her 16-year-old son, Donne, at least when it comes to his driving. Donne has to drive around with a big magnet on the back of his car that reads "Caution ? Newly Licensed." And if Kessler has her way, your teen driver is going to be embarrassed too. Through the nonprofit she founded, Caution and Courtesy Driver Alliance, the Kennesaw mom has sold about 15,000 of those magnets across the country. Now, working with a Georgia state senator inspired by her campaign, she plans to support a potential bill next session that would mandate use of such "Caution" magnets by all young drivers. Here, Kessler talks about driving, responsibility and the line between smothering and good parenting.