http://www.guardian.co.uk/technology/pda/2011/mar/12/sxsw-2011-facebook-photos
This is an article from “The Guardian” an important British newspaper. It talks about the reality that a lot of images that people share or posts at their Facebook can be used by other people to do advertisements or another things. Sam Odio, the Facebook's photos product manager, talked about it saying that the photos that are uploaded in Facebook are more focus on storytelling than in the quality. Odio thinks that they are trying to prevent business having free rein over users but adding that business are users, so they wouldn't use photos of people to do advertisements because it doesn't really benefice them. But I personally thinks that in case that would be true that Facebook would be using photos of people to do advertisements at other parts of the world they wouldn't say anything.
Otherwise, I really understand what Odio says when he explains that when they created facebook they didn't realize the importance of facial recognition for anybody who doesn't belong to your friend's list and and also about privacy.
At the beginning of Facebook it was a really simply application but with the years have became more complicated because of the inclusion of more functions and characteristics, so it is more complex and people don't really care about the privacy configuration because they don't really know how it works.
It is a reality that have been people who discovered that in another part of the world there is a photo of him/her in an advertisement without him/her permission but facebook really have some privacy function to avoid it so people have to be more attentive to this because if you personalize the privacy of your profile anybody will can use you photos.