Like many of you here at TFL, I'm a big supporter of the 2A and the 4A. Legally, though, there's a huge gap between:
1) Local authorities requesting that people to remain in their homes (or otherwise "out of the way"); and
2) Turning that request into a directive, a violation of which results in arrest or other criminal liability.
I'm a lawyer, but I'm not your lawyer. If you need some honest-to-goodness legal advice, go buy some.