Simon Chapman, Ph.D., a global authority on tobacco marketing at the University of Sydney, Australia School of Public Health, has accused cigarette manufacturers of carrying on a below-the-radar advertising campaign by flooding the Internet web site You Tube with thousands of videos showing sexy, smoking teens. Chapman notes that the vast majority of clips show young women partying, talking or assuming seductive poses while smoking. You Tube's anonymity provides the perfect cover for companies wanting to access a young audience, and it's free advertising--possibly an irresistible combination for tobacco companies, which are increasingly constrained from utilizing more traditional advertising avenues. Professor Chapman has a federal grant to investigate the matter. Tobacco advertising has been banned in Australia since 1992.