LJ, your item #3 best describes not libertarians, but LIBERTINES!
Thomas Sowell, or Walter Williams are good examples of actual libertarians, as they know that their liberties stop where the needs of responsible others begin.
Does either Sowell or Williams advocate the “legalize all vices” the way the LP platform does, or the totally open borders/anyone can walk in no questions asked? I haven’t read enough of their writings to know those particulars. All I know is what I’ve read on the LP site, articles from Libertarians posted here (like the one in ecstasy because of the SCOTUS “gay marriage” decisions), and debating (to debase a good word) with libertarians on FR.
One of my main gripes with them is that when I ask them something like “Okay, you don’t the fedgov to pass laws against drugs, prostitution and so on. I’m fine with that, it’s not the fedgov’s domain. How about states passing such laws?”
99% of the time the libertarian NEVER EVER answers me. Ever. Only once I can remember. They claim they’re for states rights but most of them seem to want the states prohibited from any laws against the most vicious vices. And the claim that this is somehow “constitutional” and in line with the original intent and writings of the founding fathers is nothing short of lying duplicity.
Anyway, there’s my rant for the day.