The biggest exception for freedom 0 i've seen is the license on the original JSON implementation http://www.json.org/license.html http://www.json.org/license.ht

The biggest exception for freedom 0 i've seen is the license on the original JSON implementation http://www.json.org/license.html http://www.json.org/license.html. > The Software shall be used for Good, not Evil. The JSON license is not considered a free software license due to this violation of freedom 0(not to mention all the problems with definition including the fact that many things could rightly be considered neither in Good or Evil and the license actually explicitly says it must be used for Good).