US Marines ban Facebook, MySpace, Twitter

In addition to malware exposures, there's the old axiom of "loose lips sinks ships" applies as well.

U.S. Marines ban Facebook, MySpace, Twitter
http://blogs.zdnet.com/security/?p=3907

QUOTE: A few choice quotes from the Marine Corps order:

* “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…”
   
* “The very nature of SNS [social network sites] creates a larger attack and exploitation window, exposes unnecessary information to adversaries and provides an easy conduit for information leakage that puts OPSEC [operational security], COMSEC [communications security], [and] personnel… at an elevated risk of compromise.”

Facebook, MySpace and Twitter have been constant targets for malware attacks that exploit the trusted nature of social networks to lure users into clicking on links to malicious sites.