When someone takes a picture of you, they need to have your consent. After they have your picture it is their right to distribute it. This is not a problem of facebook, more a problem of someone violating your Personality Rights.
This for example allows you to take a photo on the street and publish it even if the photo contains some strangers. The concern that does come up is whether the subject of the photo has a reasonable expectation of privacy; if they are in public, they do not. (note: not a lawyer, but I have taken many photos of strangers)