The NAP is a noble principle. The people are basically the same as Christian-Libertarians to me. Both groups of people would be my first choice as neighbors. But in both cases you get a sect of people who take their views to extremes in different ways.
The difference is, with the Christian-Libertarians, your fruitcakes are going to get power hungry and try to subvert the group by taking power.
My concern with the NAP fruitcakes, are the opposite, in that they won't assert any power at all even when its necessary.
When a cancer emerges in the society, they won't do anything at all to cut it out before it's too late. For example, when someone buys land and builds a strip club in our neighborhood, and our houses are going to fall from $100k to $20k, I hope the NAP people are willing to use to force to cut out this cancer rather than cite the NAP principal (from an archetype standpoint, we must drive the thieves from the temple, not wait for them to show force).
But I think you and most NAP people agree with that. I didn't mean to denigrate the NAP philosophy. Any principle taken to its extreme can be criticized.