Molyenux has said that "virtue can not exist without voluntaryism," and this is intuitively resonant even if it can lead to some absurd collusions. If a bank robber charges into a bank with a gun and starts shooting at the security guards, we would not call the security guard a murderer if he either made a narrow miss and shot a civilian instead of the robber, or if when he himself had been shot accidentally pulled the trigger as he was dying/falling and the round hit some bank teller in the head. Similarly, we can say that honesty is a virtue, but in a situation lacking voluntaryism- like a Nazi demanding to know the location of a dissident- "no virtue can exist."
Now, we can use this reasoning to justify voting for "the better slave master" who will minimize NAP violations, if we have the option of doing so.
Another example would be if there is a train headed for either 3 individuals tied to the track who are all highly intelligent, productive, support large families, favor liberty in all realms, or 14 individuals who are low-IQ, have extensive violent (but not lethal) criminal records, do not support anyone, etc. you can't really say one option or the other is virtue but I'd certainly rather run over 14 stupid assholes in lieu 3 kind geniuses. Frankly, I'm not sure I'd go out of my way to save those 14 assholes if the other track is empty- obviously I'm not endorsing intentional murder, but I am generally not in favor of lifting a finger to help 14 people who are violent parasites, human predators that almost certainly have an incurable dearth of empathy (withdrawal of empathy to a perceived enemy is distinct from sociopathy, sociopaths can not empathize with anyone.)
Anyways, take immigration as another example, in a free society there would be no public land where private individuals would be forced to associate with disliked groups, currently it is illegal for a group of white people to move to some area, build a community, and keep it exclusively white- they can try to keep home prices high and demand a clean criminal record to live there, which indirectly mostly fulfills that goal, but if it's found they refuse to sell to blacks their property rights are essentially forfeit, we can form communities on the basis of religious doctrine, nor would it be likely that our right to form a community based on a political ideology would be respected by the Federal government; our ability to keep those we deem undesirable within our communities has been destroyed, we might try to socially ostracize them (impossible given the widespread endorsement of cuckoldry by the unwashed masses) and it's illegal to effectively economically ostracize some group on the basis of their IQ/ideas/religion/etc. Furthermore, libertarians are also forced to support ideologically opposed, low-IQ groups that hate liberty and love big government violating the NAP on their behalf, so if you keep a "wide lens" and look at the issue of education, the welfare state, and the border, you can justify borders with the one-two punch of low-IQ groups not appreciating liberty or understanding history/economics, such groups likely being somewhat permanently lower IQ (see Rushton) and such groups ensuring the government will violate the NAP even more in future. Now, not only can I justify the borders as a "NAP-violation minimizer" but I can also justify voting for a candidate (Trump) who wants to protect the borders and is generally more NAP-friendly than his likely opponent (cough Hillary.)
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