So why did The U.S. Marine Corps ban Twitter, Facebook, MySpace and other social media sites?

Question From User - Answers in Comments.

"These internet sites in general are a proven haven for malicious actors and content and are particularly high risk due to information exposure, user generated content and targeting by adversaries," reads a Marine Corps order, issued Monday.

"The mechanisms for social networking were never designed for security and filtering. They make it way too easy for people with bad intentions to push malicious code to unsuspecting users," a Stratcom source told Wired.com.

Yet many within the Pentagon's highest ranks find value in the Web 2.0 tools. The Chairman of the Joint Chiefs of Staff has 4,000 followers on Twitter. The Department of Defense is getting ready to unveil a new home page, packed with social media tools. The Army recently ordered all U.S. bases to provide access to Facebook. Top generals now blog from the battlefield.

"OPSEC is paramount. We will have procedures in place to deal with that," Price Floyd, the Pentagon's newly-appointed social media czar, said.

Thanks Czar.

I wonder now.
It just bothers me.. because they can issue a direct order for troops not to divulge whereabouts under pain of court-martial and that would be more effective than cutting off access to the public through media sites like Twitter and Facebook. I mean.. I don't know of anyone in the military who says.. "Hey Mom, come visit me, I'm two clicks north of Kabul."