Because being in Iraq or Afghanistan didn't suck enough...

[FEJ]

It could be preemptive security issues also. Anyplace someone can post a photo or video could be a leak if someone recognizes the background. Also it could have to do with the bandwidth. Not everywhere they go is wired, and i am sure a lot of it is satellite feeds, which are not cheap and those site can suck the bandwidth. That and there is so much crap in the background of myspace I understand why the military wants to block it. I have seen myspace take down windows boxes and the last thing the military needs is to explain that soldiers died because of Myspace. :P