Generally, you only have a right to something that you have a subjective expectation of privacy for, and that society would deem objectively reasonable. So for instance, if you keep a gun in a see-through bag, that’s 1) stupid and 2) you’d have no reasonable expectation of privacy because the bag is see-through. Next example — maybe you keep things in your car and expect them to stay hidden. Society wouldn’t necessarily deem this reasonable because your car is traveling on public roads and people can see into it.
Check out: Katz v. United States, 389 U.S. 347 (1967)
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