Why do TV game shows and documentaries insist on pretending that film crews don’t exist?

Why do TV game shows and documentaries insist on pretending that film crews don’t exist?
The sheer, unrelenting misery of the British cinema experience in the early 1980s.
The paranoid and conspiracy-driven films of America’s biggest fundamentalist production company.
A selection of predictably hysterical and ill-informed British TV documentaries and discussion shows from the height of the Video Nasty moral panic.