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You have ZERO financial privacy
(links.hackliberty.org)
Privacy is the ability for an individual or group to seclude themselves or information about themselves, and thereby express themselves selectively.
You're probably talking about ammonium nitrate specifically. And once you've made your explosive with it, you still need to make something to detonate it, since it's pretty stable without that; it's not like sweating dynamite.
ANFO was used to blow up the Alfred P. Murrah federal building in Oklahoma City, so the feds take that pretty seriously.