Opsec.....ohhh big headache on that one.
My professional view on the matter (from an 6 TIS, 31B02 Active Duty Solider with two tours and a third coming next year) if it involves anything detailing or showing current units deployed overseas, interior of FOBs which includes defensive layouts, location layouts, and infrastructure, senstive information, classified material to include equipment (DUKE systems come to mind), detainee detention facilities and/or any photos showing detainees, current/future operations, and/or anything that might compromise unit missions and safety is strictly a No Go!
Pictures from past or previous operations (including personal photos) dating back a year or more is okay to post without bluring out any information since almost all units involved in that operation have rotated back to the world or has already been discussed numerous times on either the History or Military Channel (imagine my suprise when I saw my squad in footage of a raid that we did in mid '03 was being aired only about a few months from getting back on the History Channel's Hunt for Saddam special). Any pics dealing with units under the command or directly attached to USSOCOM should have all information including faces and insignia's blurred out no if ands or buts. This is to protect the operators who frequently rotate in and out of the war zone a lot more than conventional military units.
All information provided above can be found directly in Joint Publications 3-13.3