>> "Jane goes to a party but doesn't want anyone who wasn't there to know. Jane's friends post pictures of her at said party. Now everyone who checks Facebook before Jane sees that she's been tagged in these pictures. Until now, Jane's never really considered that she should screen tags for approval first."

There are privacy settings for this (which I use). You turn on an option that all tags (photos, posts, and check-ins) have to be approved by you before they appear on your timeline (and thus visible to your friends).