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[1] As as aside.... There must be some serious arm-twisting going on here. I cannot fathom a reason, outside of garnering favor with an increasingly powerful and arbitrary government, that a profit-seeking business would allow fear-mongering within their premises. This cannot be good for retail. Amazon must be licking their lips.
[2] It's doubly unlikely that this will ever appear at Whole Foods, as the founder seems to be a libertarian. If he was interested in political favors he wouldn't have posted that WSJ op-ed on health-care.
[3] Orwell parallel: in 1984, only the members of the Inner Party could turn off their telescreens... though they also left the proles more or less in peace.
[4] Regarding the suggestions below that this could be good business for Walmart... there's truth in what you say, but I doubt it applies in this case. A fearful message such as, "It's hurricane season. Stock up!" would likely be effective (in certain geographies). Reminding people that gathering at your particular establishment might be dangerous, though, seems less likely to engender repeat business. "There may be terrorists lurking in our parking lot. Beware!"