The abbreviation " VPN " has slowly become established among average Internet users, which is certainly good, but the problem is that people have started to see VPN as the ultimate solution to all problems.
UPDATE: This trick no longer works because Facebook has changed the structure of photo links! You've probably seen those "special" Facebook image links that are used to show a picture of your friend to someone else. Such links only lead to the image, not to the owner's profile. But there is a way to find out whose picture it is from that link.