'Joyriders' are not allowed on board during aerial work operations
Point taken and perhaps I used the term some what loosely. Most of the work I did was for a private operation and occasionally the photo task was merely to have the photographer sitting in a window seat so a snap could be obtained while on downwind for landing on a crew change flight. You can get yourself in a mess with blinking rules. Taking along another company pilot so as to give him exposure would come under the heading of "joyrider" if you don't have instructing/training responsibilities and he's not essential to operations.
Be very clear of your intentions and the rules you will be operating under
Too true. The discussion about the Yak 52 accident in Brisbane
may have a lesson in this regard.