Of note, that incident stopped pretty quickly, and was responded to by many states promptly passing laws prohibiting such behavior. It also occurred in an area where such behavior was more likely accepted by residents.
Once news started spreading widely, the confiscations stopped fast.
Again, remember that it was an extremely localized area where it happened. In the case I posited where those EO's are tripped, there is no basis for any Congressional oversight for a minimum of six months and the entire Bill of Rights and other Constitutional guarantees as well as ALL applicable state laws will be suspended and it's perfectly legal. Once an EO is published in the Federal Register Congress or the USSC has just 90 days to register a protest or the EO becomes the law of the land. This fact once prompted a staffer of fmr Pres. Bill Clinton to remark in public: Stroke of the pen, law of the land. Pretty kewl.
Even though the effects of Katrina spanned several states, it was still tightly localized and the worst hit by far was N.O., where of course the most severe abuses by government happened. The bigger the disaster and the wider the disaster zone, the likelier there will be local as well as state sanctioned abuses in the name of public safety, which seems to be justification enough for all sorts of atrocities for which nobody is ever held acutely accountable. Remember, once rights are suspended, they very rarely reappear without some form of physical action as a guarantee. How many sheeple you reckon are gonna even stand up to back what the Sheepdogs must do THEN in order to save the Republic?