So even back in the early 90s when I dabbled in Libertarianism, people had a more nuanced take here, in that shared resources like water and air that crossed land boundaries would be protected by law. For instance you could do a class action lawsuit against the person damaging your air and water. But no one is that nuanced now.
No one is living 100% to ideological perfection. It’s a spectrum. Some are a lot closer than others. I’ve definitely met some ascetic non-judgemental types.