I learned about Facebook's "acquaintance" and "restricted" lists just a few days ago, and it's wonderful. There's a lot on Facebook I do like seeing, but there have been a few occasions where people have posted things that really change how I view them. For example, my dad and I talk far less than we did before I found out he's a massive bigot, and I just plain feel uncomfortable around his brother, who was always the "fun uncle" growing up.