You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract How Brands Can Use Pinterest Without Breaking the Law Sorry, But Most Images On The Web Aren't 'Public Domain' By Brian Heidelberger, Published on March 01, 2012 12 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.