Irrespective of anything else, I think libertarians of any kind have to contend with that Corporations can be extremely powerful entities that can be just as bad as governments. At the very least, setting their sights on governments alone seems terribly inconsistent and incorrect. In no small part because megacorps can yield governments in their favor, and by the point they're extremely powerful megacorps, the libertarian calls against regulation (yielded by megacorps against interests of the population) tend to fail.

But it's not just regulation megacorps can use, the most frequent is just various forms of capturing and dominating a market, I guess.

For example, Google is on the process of deciding or severely restricting independent developers on Android. I think by reasonable interpretation, user freedom is being severely restricted. But most people have little recourse, it's either Android or iOS (and by now both are similarly bad in different ways). There are some alternative OSes and devices, but there's a significant chance you may rely on some real world service that needs one of the two major ones.

Without trying to overgeneralize everything, in this particular example I don't see how things could change without regulation.

(and, if you will, in that case you can generalize to the implication that regulation isn't necessarily always bad)

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I think the lesson to take isn't that the cyberlibertarians were 100% wrong and we need maximum government control and surveillance over the internet. The world tends to be complex and most simple stories we come up with (which are the ones that tend to sound good on our ears and be most comfortable) tend to be wrong in various ways. The world demands, at least, flexibility from ourselves. Sure, be inspired by one idea or manifesto or another, but don't follow it blindly always.

A relative freedom of communication and widespread access to information arguably is pretty good for civilization. When you can talk and relate to people from allover, the justification for war seem increasingly flimsy. But various forms of regulation preventing single megacorps from dominating the global internet (or simply local wired internet access in your region), can be important. Maybe we need to protect more discourse against bad actors and the incoming flood of LLM-generated, possibly propaganda-fed content. Keep an open mind. Whatever decisions we make we can walk back and change course.

The fundamental principle isn't this or that ideological current, but that people are living good lives. Happy, in peace, full of awesome possibilities. As someone wiser has once said, remember your humanity and forget the rest! :)