Privacy rights are at the heart of a free society. The Fourth Amendment provides valuable protection against unreasonable government intrusion. Police can't break down your door for no reason. They can't search your belongings without justification. They can't arrest you on a whim.
"The dramatic video became another flashpoint in a national debate about police use of force and how officers treat civilians." - TIME
The Case of Carpenter v. United States
If you think that privacy rights protect you from criminal prosecution for the things you do in your own home, to a certain extent, you are wrong. If you are caught downloading child pornography or have unintentionally downloaded child porn that alerted a federal agency, you may find yourself at the center of a criminal investigation and the recipient of a legal request to confiscate your computer.