I have pixelized the faces of the recognizable people wearing a red cord (as they don't want to appear on pictures). I hope is fine.

For instance, one recent blog entry from the Irish Data Protection Commission discussing events at schools borders on the absurd:“Take the scenario whereby a school wants to take and publish photos at a sports day ­– schools could inform parents in advance that photographs are going to be taken at this event and could provide different-coloured stickers for the children to wear to signify whether or not they can be photographed,” the Commission suggested. The post goes on to discuss the possibility of schools banning photographs at a high school musical, but suggests that might be unwieldy.