Most prepper guides devote a lot of time to societal collapse, complete self-sufficiency, urban combat, and wilderness survival topics, while dedicating much less attention to more pragmatic risks that one can prepare for without making profound lifestyle changes or buying a farm.

The emphasis on headshots in zombie preparedness. As an extension of "zombies as human surrogates" concept, there's one group of humans for whom a headshot is the surest way of ending hostilities. Law enforcement/military.

It's not politically correct to openly admit that you're preparing to resist against a military occupation.