The following is just an idea for some possible text. I'm not a great writer.
We, the supporters of freedom and liberty hereby petition you to immediately remove Bob Barr as the Libertarian Party nominee for President of the United States. Furthermore, we request that he not be replaced by the current vice presidential nominee Wayne Allen Root, but by another candidate.
This request is not made lightly, but with much seriousness. The actions, track record, and history of Bob Barr has divided libertarians and other liberty leaning individuals across the nation.
(A list of reasons why he should be removed would go here.)
Whereas, he broke his commitment to participate in Ron Paul's press conference.
Whereas, his history as, "the most rabid Drug Warrior in Congress" makes the idea of voting for him repugnant for anyone who values their right to control what they put into their own body.
Where as, his track record of voting for the "Patriot Act" puts fear in those that value their civil liberties and right to privacy.
Where as, his previous support for the "War in Iraq" makes it impossible for peace loving citizens to support his candidacy.