I am shooting a documentary at a public event. Do I need anyone on camera to sign a release form? It seems that with "expose" stories on the evening news, they're always showing some lowlife scammer in some undercover sting. You would think they wouldn't want their face on camera. Also in Bowling for Columbine, Michael Moore visibly upsets Dick Clark and Charlton Heston and they both storm off. They couldn't possibly have signed a release. Thanks Mopak