Easy: Your contact list. You may not care who sees your list, but the people on your contact list would probably be upset if their private email address, cellph

Easy: Your contact list. You may not care who sees your list, but the people on your contact list would probably be upset if their private email address, cellphone number, chat name, home address and other personal data were exposed to the general public. Ditto any conversation you had with them via text; you may not care who sees the conversation, but your partner/friend/boss may object to having their privately texted words plastered all over Times Square. Your GPS location data is another good one. Hypothetically speaking, would you really want the public, which contains some seedy characters mixed in with the "normal" people, to see the route you take to drop off/pick up your daughter at school, making her easy pickings for a kidnapping? There's more than just the websites you browse and the people you talk to on your phone. It's a digital vault of every move you make, every question you ponder, every person you've interacted with, every store you shop at. Your banking data is there, your stocks, your hobbies, your bursts of anger, your outlook on life, your loved ones' and associates' addresses and contact information. In short, you hurt more than yourself by exposing your private data, whether to the public at large, the government, or commercial entities seeking to hoover it up for advertising revenue. It's your responsibility to keep it private.