Nine-three percent of people polled believe that internet companies should be forced to ask for permission before using your personal information , and 72 percent want the ability to opt out of online tracking. Why, then, do so many people share sensitive details of their life on Facebook? Often it's because users do not realize that their data are being collected and transmitted in this way. A Facebook user's friends are not notified if information about them is collected by that user's applications. Many of Facebook's features abd services are enabled by default when they are launched without notifying users. And a study by Siegel+Gale found that Facebook's privacy policy is more difficult to comprehend than government notices or typical bank creditcard agreement, which are notoriously dense. Next time you visit Facebook, click on Privacy Setting, and see if you can understand your options.