Oxford using Facebook to discipline students

An anonymous reader writes: Oxford University is using facebook to investigate "trashings" (dousing classmates in eggs, flour and genereally making a mess) when the students involved post the pictures online. The school has taken to emailing the students fines from $80 to $200 for breaking the rules. In my mind this sounds like the school is playing judge, jury and executioner. What happens when it was all in good fun, no property damage involved and the clean up is a hot shower? I fear where this is turning to. Where someone can get judged by merely a picture. http://www.msnbc.msn.com/id/19813092/