I know of no thinking person who agrees with any political party on every plank of the platform. As a matter of principle, it is, imho, more honest to openly disagree about an issue than to carry on as if it doesn't matter. Open borders (Libertarian platform) is nuts. Ideally free me could roam as they will, but then, this isn't an ideal world.
There's quite a bit of variance in Libertarian thought even here on FR. OWK is far more absolute than I. Not that I consider him wrong, we just disagree on some areas of implementation, not so much in principle.
Most L's on FR are shades of Pro-life vs being shades of pro-choice. And nearly all L's I actually know are pretty decent church-going types who really like their guns!
btw, fwiw, I, too, am a former mensan
Greeting fellow former "M" ... actually just non-dues paying member. I not sure that if once you pass the tests that they can dock your IQ for non-payment.