You said it better than I would have. GP has a misunderstanding of libertarianism and perhaps of the concept of liberty.

Libertarians (small-l libertarians, colloquially) don’t break norms “just because”, they do it only in specific circumstances based on a calculus. Everyone’s calculus is different, but the usual reasoning would focus on possible infringement of others’ rights when breaking the norm and the seeming validity/grounding of the norm. And perhaps the risk tolerance of the individual and likely consequences.

GP seems to be taking about anarchists (and a particular species of anarchist at that). There is indeed some overlap but libertarians are not allergic to norms. “Rights” themselves are a norm.