We are literally living in a horribly written sci-fi movie with so many incompetent villains, that are all trying to take over at once. Never let anyone have access to your life unless they have a very good reason. You're not 'hiding' anything, you are preventing unscrupulous individuals from exploiting you. Do you leave your car or home unlocked with the keys in the door? Preventing a crime before it happens is the reason Privacy is important.