I knew a guy who paid real big money to have completely anonymous people follow him all over the world, on one condition:
He would give them his itinerary and the the unknown person would take photos of him without him detecting the cameraman, and all the images would be mailed to him after the trip.
These were all expense paid gigs...Everything.
Personally ya couldn't pay me to go to foreign countries today....Not on Learjets with fully stocked limos at the destinations. For good reasons....
Slightly off topic, but this shows how stupid the airlines policy of not allowing the name on a ticket to be changed. I once had a trip set up for a friend who can not attend, and the airline would not allow me to give it to another freind. What’s the big deal? It is my purchase, all it takes is a couple of keystrokes that I can do myself. But, I could have just found someone with the same name as friend, or at least an ID with that name on it.