That's...sigh...I hope most people are saying they do it as a joke, but then if enough do, someone will take it seriously.
If you want to be weird about bleaching agents...why not stockpile dry bleach, in case the government decides to spray your house with mustard gas and you need to decontaminate it? That's actually a thing you can do with bleach (wear protective clothes, start from upwind).
Or adding (tiny) amounts of bleach to drinking water will sterilise it, the CDC recommends that for emergencies. I'd not be game to do that myself...or to decontaminate places sprayed with mustard gas, though.