According to personalism, is political libertarianism compatible with the Golden Rule? This question poses a conflict between two philosophies, but is not meant to necessarily compare their strengths.  Only if Love of Neighbor is indeed the antithesis of the libertarian philosophy.

Libertarianism as I understand it (from reading lots and lots of Robert Heinlein Sci Fi) is the idea that laws should be crafted so that personal liberties are always acknowledged.  So long as you don't hurt anyone else, whatever you do is OK.  Drugs, Sex etc... are legally OK, but it's not advocated in any way leaving a person in a state to excercise their freewill and follow God in their own way. The other side of it is TANSTAAFL (Their ain't no such thing as a free lunch) which is pretty bibilical (If they will not work, neither shall they eat) in the end of 2 Thessalonians).

Personalism as I understand it (from listening to lots and lots of Catholic radio and reading John Paul II's Love and Responsibility) says that, A person is an entity towards which the only reasonable attitude is love, as an extrapolation of the 2nd greatest commandment and the Golden Rule.  Therefore, if you consider yourself a person, then you ought treat others as you want to be treated and you shouldn't do things to yourself that you wouldn't do to others. 

So, as far as I can see it, it is pretty difficult to reconcile the two ethics.  According to personalism, is there some depth into libertarianism that a Christian can delve, and then they need to pull up and get a breath of fresh air, or should it just be totally avoided?
When I hear Libertarians talking about how each person's only responsibility is to themselves, I tend to think of Cain. When God asked him where his murdered brother was, he flippantly responded, "Am I my brother's keeper?" (It's not my responsibilty to look after him! He ought to take care of himself!) I don't think most Christians would consider him good company to be in.

Jesus's famous "new commandment" was to "love one another as I have loved you," and the way he loved us was to give of himself at every opportunity, even unto laying down his life for us.  And James condemned those who saw others in need and did nothing to help them, saying that their faith was "dead" and could not save them.

Contrast this with the doctrine of Ayn Rand, probably the single most influential philosopher in Libertarian thought. She taught that the highest moral duty is rational egoism, and that altruism and social responsibility are not only not required, but actually evil and inherently harmful to society!

Like any philosophy, libertarianism has some good points, but on the whole it's principles are strongly opposed to the teachings of the Gospel, and it ought to be avoided if not actively opposed by disciples of Christ.