Lysander Spooner is not a mainstream American political philosopher, except to the extent that you consider anarcho-capitalism mainstream. And your citation does the same thing you just tried to do, which was to define away the liberties you don't care to defend as "crimes". Spooner does so more rigorously, and isn't deploying his arguments as a superficial attempt to deflect an argument, but I don't see how your citation is particularly helpful.
I'm also going to raise my hand, declare ancap philosophy to itself be a worn-out Internet meme, duck, and run away.
> Lysander Spooner is not a mainstream American political philosopher
Immaterial. He's been an large influence on American political life[1], alive and dead.
> I'm also going to...duck, and run away.
I always appreciate this response from people with an attachment to the government/State than the more common approach which is to call people names. Many thanks.