When I was a Facebook user (closed my account six years ago), I was mindful about what I shared. The privacy concerns that eventually prompted me to close my ac

When I was a Facebook user (closed my account six years ago), I was mindful about what I shared. The privacy concerns that eventually prompted me to close my account were not due to the information that I willfully shared, but rather, due to Facebook's behavior collecting more information about me (and about others, through me) that I was not intentionally sharing. E.g., tracking users across the web at large, building shadow profiles of non-users, trying to obtain information about non-users through users, etc. In my observation, most Facebook users share way more personal information than I ever did. Which makes me wonder, given how much information people are sharing willfully, why does Facebook feel the need to try to secretly collect even more information? Scary.