People have a right to privacy, and there's social expectations which ensure that people generally have it. Generally speaking, people don't like it when other

People have a right to privacy, and there's social expectations which ensure that people generally have it. Generally speaking, people don't like it when other people spend huge amounts of effort trying to learn things about them that they would prefer not to share. It's more-or-less equivalent to if someone spent all their time looking through your trash and monitoring you 24/7 to learn if you're pregnant, what meds you're on, how much money you spend in a week, etc etc.