Anon is correct. The reason that someone can violate another’s privacy is because there are insufficient property rights due to the ‘tragedy of the commons’ in ‘public’ areas.
However, we don’t need to get that complicated. If all citizens of a village are shareholders, and shareholders vote to create a contractual obligation that we don’t look up women’s skirts, then there is nothing that violates ‘libertarian’ principles. It’s a private corporation. The shareholders determined the rules. The people can voluntarily go to that village or not.
The problems for libertarians are a) that we don’t have the right of exclusion (we can’t randomly forbid people from shopping malls or city streets), and b) we don’t have the right of secession, which means we can’t set up our own rules for our own neighborhoods. This amounts to the government causing and subsidizing bad behavior.