Treat Facebook as the private walled garden that it is. If you want something to be publicly accessible, post it to a real blog on any platform that embraces the real web, the open one.
This is a good point, one repeated by others. If you are dependent on the web for your work, maintain an independent website. And everything you post in FB is locked in there and relies on their whims to access.
Source: Daring Fireball: Fuck Facebook