@futurebird yeah, I knew some US libertarians via the internet in the late 90s and many of them weren't too philosophically different to black flag anarchists. Lot of queer kids and kindhearted alternative subculture types.
In the years that followed, a lot of them switched over to more European style anarchism, and a couple of them sadly came out as unconscionable arseholes who'd only ever been paying lip service to notions of personal liberty, which seems to be where the dominant strain of US libertarianism ended up.