The Police and the Law.
Taking Photographs in a public space - until recently people were getting accosted and arrested for this.
"I believe there are more instances of the abridgement of freedom of the people by gradual and silent encroachments by those in power than by violent and sudden usurpations. ... The means of defense against foreign danger historically have become the instruments of tyranny at home..If tyranny and oppression come to this land, it will be under the guise of fighting a foreign enemy." President James Madison