The FIA's point is that most team personnel who are in the pit lane (not pit wall) are in full protective gear with helmets, visors, firesuits, etc... The camera guys on the other hand have no safety gear, are lugging heavy gear and are usually moving around while focussing on what they are shooting.
While the media were the first ones banned I can see them starting to require full gear for team bosses or anyone else who moves from pit wall to garages during the race.
+1 on xcarguys helmet cam idea. IIRC there were a few tire changers with helmet cams last season.