Katz, I don't do the FB thing either. I have an account with an email addy no one knows about, and no pictures, and no friends. It gets me in far enough to gain some intel I may have been seeking. You can view a lot with just a logon and no real involvement. Why would I do this? Sometimes idle curiosity, and sometimes it's good to know who is friends with who, so you avoid saying something stupid IRL about a person unknowingly to a friend of that person.
If FB was around twenty years ago...I probably would have totally been into it. I don't feel like it now and forum posting is the MOST social networking I do, if it even qualifies as such.