In a sly move that has infuriated some privacy advocates, Facebook has quietly changed the posted email address of all Facebook users.

With no warning to anyone, Facebook issued each of its users a new email address, replacing the existing email address listed in the contact information section that users chose when signing up for their account. All Facebook users now have an address.

The changes were first pointed out by bloggers, and then publicized by the media a short time later, leading to an influx of complaints from users.

Facebook says that the new email accounts will allow users to easily communicate with outside addresses via their Facebook account.

For those users that are concerned about the change, Facebook says not to worry. In a statement a Facebook spokeswoman said that the site is also rolling out a setting that allows users to decide which email addresses are actually visible on their page.