We tried a tax on fatty foods in Denmark and it was a huge mess. People would just drive to Germany to get the stuff, and managing it was an administrative nightmare: <a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;2012&#x2F;11&#x2F;13&#x2F;business&#x2F;global&#x2F;fat-tax-in-denmark-is-repealed-after-criticism.html?_r=0" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;2012&#x2F;11&#x2F;13&#x2F;business&#x2F;global&#x2F;fat-tax-in...</a>