Because Facebook actively encourages people to post more than what is necessary, or even a good idea. It's to Facebook's advantage that most people don't under

Because Facebook actively encourages people to post more than what is necessary, or even a good idea. It's to Facebook's advantage that most people don't understand the depth of data being collected or the possible consequences of oversharing, so they do everything in their power short of outright deception to get people to post more. Of course, not 100% of the blame lies directly with Facebook since they're not actively holding guns to people's heads forcing them to use the service, but I see it as more akin to predatory lending where the business profits by exploiting their customers.