There’s actually two items that they forgot to tick off on the checklist before fomenting revolution (OWS).
As you said, they disregarded the need to disarm the citizenry first.
Second, though it is in process, they haven’t completed the corruption of the military yet, either.
I think their “street revolutionaries” are getting ahead of themselves.
Let's hope this is true. It could be that their position is more solid than it looks.
Actually, this is where their hubris shows; they think that because all of the military they know, the top-brass "perfumed-princes" (as Hackworth would call them), are all part of their political/elite clique that all of the military has similar stances {and those that don't are mere grunts who have to do whatever their betters tell them!}...
but they miss one important thing here: those very grunts are oathbound to the Constitution, not to their officers, should the officers disobey the Constitution.
But, who knows, maybe the institutionalized political correctness in the military has rendered all the "heads" thereof corrupt.