I signed up about a month ago when my son joined and 'invited' me to be his friend. I don't go there too often - I feel like I'm snooping on my kids when they were little.... But, on a whim, I did a search and found that several of my friends (listed in my email) are also members.
I' invited' them to be my 'friend' - at least they are in my age bracket. Can't wait to explore why they are on Facebook. Probably all joined because of their kids, also.
God, I feel old..... But, I think it's important to keep current. My Dad was just boggled over my the computer and had NO concept of the internet. As hard as it is to keep up with today's technology - if you don't 'use it - you loose it'