The Marines’ ban will last a year. It was drawn up in response to a late July warning from U.S. Strategic Command, which told the rest of the military it was considering a Defense Department-wide ban on the Web 2.0 sites, due to network security concerns. Scams, worms, and Trojans often spread unchecked throughout social media sites, passed along from one online friend to the next. “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 Danger Room.

Banning the spread of disinformation? They know the power and danger of propaganda.