2.) Your Already Able to Protect yourself: Flickr already provides a facility for people to mark photos, private, or for friends and/or family. If someone wants to upload photos of their children and is concerned with who views them they should simply mark them to be viewable only by friends and/or family. (From the last link)

I think we have a winner!

And, um, anyone who can't figure out Flickr's incredibly simple filter settings when they're uploading a pic should not be on the intertubes.