If someone had access to everything you have posted all over the internet they will know who you really are - perhaps even more than many of your close friends. Imagine me as this person. I know who your elementary, highschool, and college classmates. I know who your former and current officemates are. I know your preferences and your interest based on the websites you visit. I know your hobbies based on the photos that you shared and the organizations and clubs that you've joined. I know your favorite hangouts based on the statuses that you posted. I know your Social Security Number, your Bank account, and your Credit Card information – every data about you. I could use this information for something harmless as giving them to commercial companies so they could send you offers that you will probably like because they are based on your personal data. Or this data could get leaked to individuals who have more malicious intention. What are the bad ways your personal dat...