As far as privacy goes, the USA Patriot Act is probably one of the better examples of "we have to erode privacy to catch criminals": https://en.wikipedia.org/wi

As far as privacy goes, the USA Patriot Act is probably one of the better examples of "we have to erode privacy to catch criminals": https://en.wikipedia.org/wiki/Controversial_invocations_of_the_Patriot_Act https://en.wikipedia.org/wiki/Controversial_invocations_of_t... As for general "bad people can use it" scenarios, US airport security would be my go-to example. Everyone has to take their shoes off at airport security, even though the Deparment of Homeland Security's own tests have shown that that terrorists could still still easily sneak weapons and explosives through security: https://www.latimes.com/nation/nationnow/la-na-tsa-screeners-20150602-story.html https://www.latimes.com/nation/nationnow/la-na-tsa-screeners...