Some people don't seem to realize that once you put something on the internet, it's there. Forever. I greatly dislike sites like Facebook because people share photos that never should have been seen, or that those IN the photo may not want on the internet for all to see. I don't believe the filters limiting "who sees" are enough. Your photo is now stored on a server somewhere and people have access to it, whether specifically given the privilege or not. I very much dislike the idea that photos of me, or my child, may be on Facebook somewhere because someone posted without asking me first. I do not have a Facebook account and therefore cannot check up on these things. I have heard enough about Facebook to not have the slightest interest in being involved.
My sister has gone about the "share our lives" thing an entirely different way. She's got a personal blog that is passworded so that only those she personally invites may go see this site. She also is very concerned with safety of our personal information and photos of children, events, etc.
Of course, I am irked by the way personal information is available to the public in general. I bought a house years ago and the local newspaper posted that this address was purchased by this person for this much $$. Granted, it may be "public information", but make people go hunt it up at least, no need to broadcast it like that! Also, paying to have my phone # unlisted/blocked seems backwards to me. One should have to pay to BE listed, not pay for privacy. (Never mind that it doesn't stop the telemarketers/political surveys, etc from calling me constantly anyway..)
Sorry, that turned into a rant. I stand by my opinion of Facebook and similar sites, however. I wish to be in control of my image and personal information, and it irks me that someone else could take that control right out of my hands.