people in the past have had their ufc media passes revoked.
Sherdog did when Dana didnt like them covering Pride and putting some UFCs down.
Josh Gross from Sherdog got his media pass revoked. They then tried to hire him behind the scenes so I guess he wouldnt write any more bad articles.
@Brian J. D'Souza got it revoked when he asked a question about fighter pay a month ago
Jonathan Snowden from bleacher report got his revoked because he said something they didn't like
Cagepotato got it revoked for posting the playboy pics of Arianny on their site
UG was afraid that any talk of June's new book would make Dana not post there any more.
Sherdog didnt want to handle that whole hassle of getting their passes revoked again and again i would assume.
Basically Dana will revoke your pass and wont let fighters go to your site if he doesn't like something you say or do.