This post is from a low-reputation account and contains an unverified outbound link. Be cautious before clicking external links.
Your new vocab word is.... #Compartmentalization.
Study its inference from the Wiki link below.
https://en.wikipedia.org/wiki/Compartmentalization_(information_security)
Your homework assignment - as you observe your surroundings on a daily basis, including EVERYTHING, even TV, - see how many instances of Compartmentalization you believe could be occurring.
"but most did not know what, exactly, they were doing......."