Facebook is easy to set security so no one can see anything you don't want seen. I have two, one for family and one for quilting info. Family Facebook is set for only a few family members to access. It's great to keep up with family.
My public Facebook page has a generic email address and where I get notices of give aways, quilt patterns, bargains, etc from quilting websites. I win so much quilting things from Facebook postings! All the major quilt sites, designers, manufacturers, authors, and shows use Facebook for great information.