I hadn’t been on Facebook in a long time but rejoined during civil unrest in my city so I could keep tabs on what people in my larger neighborhood were seeing. I joined a specific group just for a several-block radius. That, plus a text group on my immediate block, plus Twitter (where I had a list of local friends from pre-unrest and trusted local media) were really essential to keeping up during a chaotic situation. I haven’t friended anyone outside that single FB group and don’t intend to. It was the most unreliable of the three, because I had no control over who is in the group and lots of people were panicking over every little thing.