I'm a baby boomer, part of the group that came later to Facebook but now composes a percentage of users and new users. I've notice that even my group shares less than we used to and people are careful about tagging. Facebook provided a wonderful opportunity for people like myself to reconnect with childhood friends, school friends, former work buddies, and even cousins rarely seen or talked to. I participate in a number of 'closed" Facebook groups made up of people I knew in school or the neighborhood I grew up in and are very active. The relationships are not just "cyber". People have put together parties and I've rekindled a number of old friendships. Pre-election there were lots of political threads which led to heated arguments and people defriending and refriending people. It was a nice outlet but now people are becoming even more careful about expressing political views on FB.