Black List
A list of people/organizations to be shunned. http://en.wikipedia.org/wiki/Blacklist
Associated heavily (in the US) will the Hollywood Blacklist of Joseph McCarthy. http://en.wikipedia.org/wiki/McCarthyism
In computing, can be a list of machines (IP addresses) to be blocked from connecting, or list of EMail addresses to be automatically treated as spam without even checking the content (SpamWars). http://en.wikipedia.org/wiki/Blacklist_(computing)
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