Self censure is futile. We all generate far too many data points, its simply inescapable, and machine learning can work with anything, it doesn't have to be explicit as long as you have enough little details. But I don't think there's any reason to panic. Governments and large corps just have a head start over the public in utilising these possibilities, but there is no reason for the situation to remain one-sided forever. Besides, any serious attempt to leverage these possibilities to their fullest extent would result in essentially an instant civil uprising.