"Soldiers have to praise the system. It's the law."
That's bullshit.
I suppose this law of yours is written and you can cite?

"Second, the military lives in protected enclaves, travels in at least HumVees, and because they are armed to the hilt have their asses kissed by most folks."

More Bullshit. First you don't meet many people rushing around at top speed in a Humvee. Nobody is gets anything from miltary if they smile at them, other than they this would have tendency encourage soldiers to protect the area in general. If are are stone faced or frowning at US soldiers they aren't going to shoot you. Protesters which aren't posing a threat [such as rioting] aren't going to be shot.

"Third, the military is subjected to incessant information (propaganda) from the DoD."

US soldiers have a greater source of diverse opinion/news then any miltary in history. And of course DoD is going to focus on good news and more importantly accurate news- and not false information (propaganda).

"Fourth, there is pressure. No promotions if critical."

No promotions for whiners, but certainly promotion for those actually solving problems- to solve any problem requires first seeing a problem [being critical- but not in sense of simply spreading rumor and whining].

"And fifth, no one knows how many of those blogs are written by the Dod. One knows that a lot are, but how many can't be told for sure."

If one actually reads the blogs, one has better chance of getting a better understanding of this likeihood.

"Given that, I'd say that one critical post would be equal to about 25 of the Chernofsomeone blogs."

This is utter nonsense. But it's a common error in critical thinking by those who believe in conspiracy theories.