Anarchocapitalism does not allow someone to opt out of the concept of property. That is not a voluntary society. Capital owners are the authorities in anarchocapitalism. A truly anarchistic society would have no private property.
of course it does. you can choose to create a commune, nobody is going to stop you unless you try to create it on the property they are homesteading in.
I didn't voluntarily agree to respect other people's purported ownership of property. They have authority to keep me off of their property that I didn't agree to. That is a non-voluntary society. Property ownership is inherently non-voluntary, otherwise it isn't ownership.