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 mind-reader and TV magician staked $50,000 on mass UFO sightings in 2002. Can you predict what happened next?
Scaring people into compliance and controlling the public discussion with vaguely worded laws and campaigns of moral panic.