bully
This term was thrown around quite a bit in late 2009 and early 2010 in reference to Heather Armstrong, particularly in the wake of Maytaggate, when she was accused of using social media to bully a national corporation into fixing her washing machine. Before Maytaggate, there had been rumors in some corners of the internet about the supposed power of the Armstrongs and how they could "bully" people and keep them quiet about things or get them to do what they wanted, but I have never had any personal experience with this.
See also: Maytag, Sephoragate, Rough Day? Hugs!, Il Duce, mythical hobbit