Check out this interesting clause in the JSLint software license. (From wikipedia)
The JSLint license[2] is a derivative of the MIT License.[3] The sole modification is the addition of “The Software shall be used for Good, not Evil.” This clause has prevented JSLint-related software from being hosted on Google Code[4] and from being included in the Debian free software package repositories.[5]
Interesting that such an innocuous modification to the license could have such dire consequences. I wish the author would drop the clause, since it likely does not decrease “evil” but makes using JSLint more difficult.