The uncertainty of the reactions from LEO, Military, etc. would be a major sticking point for many.
We must have as many of them as possible aware of what's going to happen and know where their loyalties lie. Otherwise, this thing could get ugly quick.
IMO, the FedGov, NWO crowd and others are attempting to goat us in to this very situation. We need to plan and step carefully including letting them know we're coming well ahead of time.
That NWO crowd is rabid. I really believe if there is ever a SHTF situation, they will start it. If not them, the people that are on forums like Stormfront. They hate everything. Blacks, Jews, Israel, Federal reserve, United Nation, you name it, they hate it and they have a huge following.