Day by day I find "in your face" updates and links posted by FB friends.
See, this study proves that I am right.
See, all you people who approve/disapprove of gun control (or whatever) are ruining lives.
I have opinions, often strong opinions, but I'm not sure that Facebook is an effective means of persuading anybody. It lends itself to shallow arguments and labeling.
We do need to exchange ideas on the internet and in person. We should freely state our opinions. But we need to be careful not to belittle people in any medium. Even the dumbest ideas are held by reasonable people. They won't be persuaded otherwise by being told they are dumb, but by careful, compassionate exposure to truth.
We need to debate ideas, not ridicule people