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 Why BP Isn't Fretting Over Its Twitter Impostor Oil Giant Says Humorous Feed's Followers Are Expressing Frustration By Rupal Parekh, Published on May 24, 2010 13 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.