Someones been doing nice work with the facebook API.
If your (or a friend’s) facebook account is spamming someone over chat or posting comments like this:
this is because they let a facebook app access their profile and it now has control over it. This is then used in turn to trick others into doing the aforementioned and sending people to links with ads and scams to make the creator of this money. Heres what you do to stop the app having permission of your account and thus stop spam.
1. Login into facebook and click on Account on the top right and click on the Privacy Settings option!
2.This will bring you to the Account Privacy settings page, on the bottom left click edit your settings under Apps and Websites
4.You’ll now see a list of apps that have access to your facebook account, not all are bad, but remove anyone that looks dodgy, if paranoid, remove all. To remove a app, click the ‘x‘ icon to the extreme right of it. The apps are listed in order of how recently they accessed your account, from this you can determine the spam ones.
5.You’ll now be prompted to remove it, which you can do so.
This will stop the app from being able to use your account, report the app to facebook. You may also want to consider changing your password or security question as the app may have pulled some of your basic info. You should also reexamine your privacy settings on the privacy page and adjust them fittingly (props Ben).