Online review website Yelp was named a defendant in a class action lawsuit filed in federal district court in Los Angeles.  The plaintiff claims it asked Yelp to remove a negative review, but Yelp refused and then demanded $300 a month to remove the review.   See “Yelp and the Business of Extortion 2.0: Local business owners say Yelp offers to hide negative customer reviews of their businesses on its website … for a price,” and the “Yelp Class Action Lawsuit.”