But, recently, I realized someone I used to be very close has mental problems. Undiagnosed, but there is no other way I can explain his behaviour to myself. Obsessive behaviour, can only talk about his conspiratorial obsession, erratic, spends most of his time "learning" about a specific conspiracy. And I see how Facebook is exacerbating this. I see how these things are poisoning his mind, fantasies weaved by other mentally ill people. It's just sad, when I thought about it and dawned on me most of those _wild_ conspiracy theories are people that need help feeding each other's sickness.
And then I look on my dad's wall, and saw the same hatred and resentment growing, and it scared me, the possibility he might drift even more this way.
Now I changed my mind. I think it is harmful and it does induce bad states in people that would otherwise be better, or at least... Surrounded by better support systems. But I still think it's not _just_ Facebook. It's a confluence of factors.