Do you have those friends that seem like depression is their friend? They just don't seem happy unless they are complaining? I swear Facebook has made this even worse. Some people have turned complaining into an art form. I think that they are bolstered by the people that post supportive comments, but the positive comments don't actually seem to encourage the people to change: it just encourages them to complain even more.
My husband is fascinated by one of our friends who begs for Friday every Monday. Not once in a while, but every single week. We've decided that if life is really that bad then maybe it is time to move on and change your life so that Monday is a good day. Hating 1/7th of your life is not the way to live.
Then there is a certain family member that tells us how awful life is: how tired, uncomfortable, and out of shape he is. At least once a day, among the many, many posts we are reminded how bad his life is. We started by trying to be supportive, but clearly he doesn't want or just can't accept help.