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In general, this type of video is not permitted to be used for commercial purposes without your consent.
See this article for a detailed discussion of the multiple legal theories that apply: http://www.internetlegal.com/rights-of-privacy-and-publicity-for-film-and-television/
Your rights are detailed in the link I posted to you - these include the "Right of Personality" and right of privacy (lesser right). But they are not permitted to use your image/personality for commercial or economic gain (such as for a television show) without a greater public purpose (such as a legitimate news broadcast - which this is not).
If you are "ambushed" by one of these shows, simply close the door, if they insist, you can call the police.
If they went so far as to try to air the show, you could have an attorney sue them on your behalf - but a network as large as this one will not be airing you without proper written authorization.