What's the Biggest Threat to Free Speech?

What's the biggest threat to free speech? Reason.tv asks a cavalcade of politicians, journalists, filmmakers and content creators ranging from former Gov. Gary Johnson (R-N.M.) to Fox News' Greg Gutfeld to The Atlantic's Megan McArdle to adult filmmaker John Stagliano to new media magnate Andrew Breitbart to call their shot.

Featured (in order of appearance):

Andy Levy, Fox News'Red Eye with Greg Gutfeld
Gov. Gary Johnson, Our America Initiative
Roger Stone, Political Strategist, Blogger, The StoneZone
John Stagliano, Evil Angel Productions
Cyan Banister, CEO, Zivity.com
Robert Corn-Revere, Davis Wright Tremaine
Kevin Williamson, Deputy Managing Editor, National Review
John Tierney, Science Columnist, The New York Times
Robert A. George, Editorial Writer, The New York Post
Kristin Davis, "Manhattan Madam" and NY Gubernatorial Candidate
Andrew Breitbart, Big Hollywood/Big Government/Big Journalism
Tunku Varadarajan, Editor, Newsweek International & NYU Professor
Rob Kampia, Executive Director, Marijuana Policy Project
Scott Ross, NBC-Universal
S.E. Cupp, New York Daily News and The Daily Caller
Bob Bowdon, Director, The Cartel
Tony Ortega, Editor in Chief, The Village Voice
Fred Smith, President, Competitive Enterprise Institute
Joe Garden, Features Editor, The Onion
John Papola, Producer-Director, "Fear the Boom and Bust"
Megan McArdle, Business and Economics Editor, The Atlantic
Greg Gutfeld, Fox News'Red Eye with Greg Gutfeld