How long before it's impractical to use Facebook without a dedicated app to protect you from spammers and scammers? It's a question raised in my mind by the debut of what appears to be the first security app for Facebook. You install BitDefender's safego, which is currently in beta, just as you would a game like FarmVille or any other of the many apps out there. Rather than letting you throw sheep at your friends, though, it scans your wall, inbox and any comments on your profile for malicious links that might lead to sites that try to install malware or hijack your account details. It also checks your privacy settings and offers reminders and tips on how much you are sharing and how to change those settings.