Its not just older people, its all people. Facebook's join rate has been on the up-swing for a while. Considering that it used to be only college students for years, I think the highest growth demographics will either be 30+ or tweens.
I started using Facebook because I was a high school technology teacher and a College & Career leader. I wanted to keep up with the interests of high school and college students.
I then started a family group and befriended my kids and nieces and nephews. At first they could not believe that I was on Facebook. Now they are OK with it. Almost all of my siblings joined (I could not get one of my brothers to join). I even got my dad to join (he is 78).
Now regularly, I see more and more older people on Facebook. It is a great way to find old time friends.
Do you all see that older people are joining Facebook more and more? Do you high school and college people like the older people on facebook or not?