Dear fellow citizens interested liberty,
Bob Barr is not a libertarian. He's basically a Republican infiltrator whose nomination would mean the death of the Libertarian Party, and hence the death of the possibility of electoral freedom in America. --That's the reader's digest version.
The long verion is:

He needs to be stopped from getting the LP nomination in Denver. Among Bob Barr's utterly terrible and anti-libertarian positions (positions he still supports) are:
1) He supports militarizing the drug war (an attack on property rights and personal freedom that is utterly in conflict with his supposed defense of property rights with respect to gun rights) http://www.bobbarr.org/default.asp?pt=newsdescr&RI=858
2) He opposes the right of gays and polygamists to marry ('separate but equal') by authoring the "Defense of Marriage Amendment" (which passed)
3) He supported the prosecution in Georgia that tried to sentence a black 17 year old (named Genarlow Wilson) to 10 years in prison for getting a consensual blowjob from a white 15 year old girl (playing to the racist and anti-sex theocratic 'big brother' anti-libertarian demographic) http://www.bobbarr.org/default.asp?pt=newsdescr&RI=864
4) He started his career as a prosecutor, suppressing free speech with 'motions in limine' and whining appeals for 'contempt of court', as well as practicing 'voir dire' (jury rigging) and all that that entails.
5) Bob Barr was employed by the CIA from 1970-78. This agency is a secretive agency that often engages in illegal behavior supposedly for the best interests of America. They regularly finance their operations by the sale of illegal drugs. (Details in 'The Politics of Heroin' by Alfred W. McCoy) Bob's later status as a 'drug warrior' perhaps has a lot to do with this, or perhaps has to do with him being a complete fool. Either way, he's unfit to represent the LP. source: http://en.wikipedia.org/wiki/Bob_Barr
6) He opposes (by apparently failing to understand) the right of juries to jury nullification of law, here: http://www.bobbarr.org/default.asp?pt=newsdescr&RI=771 Bob Barr, from the prior article: 'Jurors take an oath at the start of the trial to set aside their personal views and prejudices, and objectively consider the evidence to be presented to them at the trial. They are then to render their decision on guilt or innocence based on that evidence and — importantly — on the law as they will be given it by the judge.' (And I really do just think he's a simple dolt, not ill-intentioned, since he praises one of the founding fathers of our nation --George Mason-- who was an enormous proponent of jury nullification of law.)
Barr is basically a nazi, someone who does not understand the concept of property rights or personal freedom.
In addition to that, he recently made a fool of himself as the brunt of Sasha Baron Cohen's pranks in 'Borat'. It was hilarious, because Bob Barr made a total ass of himself. Check it out here: http://www.chbn.com/Clip.aspx?key=8BF2D6BFC8CACD0C and here: http://www.reason.com/blog/show/117834.html --Which means that even if he wins the LP nomination, at best he is the brunt of a billion jokes on the internet.
If Bob Barr wins the nomination, the Libertarian Party (and it's typical 48-50 states of ballot access) will basically be rendered worthless. It will no longer be the party of the oppressed minority, of the people who were taught to love liberty from experiencing the tyranny of people like Bob Barr (a sizeable enough population, once one enters Georgia). The LP will become one more party that mixes and matches its positions from a mixed bag of coercive political wishes, ...wishes that need not have any philosophical consistency.
If Barr wins at the LP con, it will be a green light for the USA government to ramp oppressing people into high-gear, Soviet style. This is because it will show our public masters that they were correct, and that the general public doesn't have any real problem with the infiltration and neutralization of actual political opposition.
History has shown that that's when things get really ugly: http://www.hawaii.edu/powerkills -the link is to "The Democratic Peace" by R.J. Rummel. It is a book that reveals the relationship between true, open elections and tyranny. The fewer and less you have of the former, the more you will have of the latter.

Thanks for reading,

-Freedom Jury
'I'm voting for Wayne Root, the Libertarian Candidate for President of the United States, on November 4, 2008.'
http://www.rootforamerica.com