Facebook can be a life saver, a godsend, a way of connecting to people you have lost touch with or long forgotten.
The downside is that Facebook can be overly dramatic, jealousy-inducing and infuriating as you are suddenly faced with points of view that you either didn't know your friends had, or that in past times would have been kept out of "polite company."
People take Facebook breaks all the time and this can be a good way to regroup and focus on what is real and meaningful in your life. On the other hand, for many people, Facebook is the main way they keep in touch with their friends and family.
An alternative to either ditching Facebook completely, or hiding and unfriending people left and right, is to pray through Facebook. When someone posts something that is disturbing to you in some way, lift it up. Give it to God. You never know what affect your quiet prayers may have on someone's life.
Someone I know recently told me about a simple and ingenious way to pray for people. If the person in need is a male, this person prays a quick Our Father for them. If the person in need is a female, the prayer said is a Hail Mary. That way, you actually *pray* rather than just thinking about praying for them, although I think God honors even that.
He is in control. We don't have to fret and worry.