The examples are so numerous, whole books have been written about it. Here are some case studies from the website of one of the books written about the persecution and silencing of Creation/ID scientists:
http://www.slaughterofthedissidents.com/index.php?p=20case_studies
And there a plenty of examples of jackbooted Darwinists trying to disrupt and/or cancel Creation/ID conferences.
The first article (below) goes to the mindset of the Temple of Darwin fanatics, followed by a few recent examples illustrating how their fascist mindset translates into actions:
In Oklahoma, Darwinist Choir Sings the Praises of Suppression and Censorship
http://www.evolutionnews.org/2009/09/its_funny_how_a_little.html
Darwinists Launch Cyber Attack Against Intelligent Design Website
http://www.evolutionnews.org/2009/10/darwinists_launch_cyber_attack.html
Los Angeles Premiere of Intelligent Design Film Moves to USC on Oct. 25th at 7pm
http://www.evolutionnews.org/2009/10/los_angeles_premiere_of_intell.html
If the facts in those articles are true, you’ve made a good case for suppression being real.
If folks don’t like what’s being said, they should refute it, not suppress it.