Also...another good opportunity to quote My Man Mitch:
We believe it wrong ever to take a dollar from a free citizen without a very necessary public purpose, because each such taking diminishes the freedom to spend that dollar as its owner would prefer. When we do find it necessary, we feel a profound duty to use that dollar as carefully and effectively as possible, else we should never have taken it at all.
I don't know if it qualifies me as a libertarian or not, but I think this is an almost perfect way of describing my general philosophy in this area.