for me Facebook is only about keeping track of friends and family. I get to see my two nieces who have children post pictures of them and every once in a while hear about old childhood friends. if I want to discus politics its in hear at free-republic.
It’s become one of my primary communication platforms, especially for the SF convention I work on. But I definitely don’t get involved in political discussion on it. There’s no point, something about the atmosphere of FB makes people trench in. And I just don’t get wound up about stuff anyway, bad on the ticker.