When Facebook stock went public they now attack,track,follow. They add virus and cookies and tracking. They change firewalls,They sell information about you and all friends that follow you to 3rd paties.They invade you're computer and see what you do and what files you have. Just sign out of Facebook then sign back in. You will be asked to submit you're name then a password. look at the bottom of that page and you will see a disclaimer that say's that you are allowing face book to do this. I turned my accounts off. It was strange when I would turn my computer off my activity light on the modem was flashing. I called a controller and they found over 90 activities from Facebook that were installed onto my computer without my knowledge. Be very leery of Facebook.