Well I did write this. Strictly speaking the only applied difference between anarcho-communism and anarcho-capitalism is that one believes in non-use ownership of the means of production and the other one does. For this reason it’s hard to really separate the two beliefs in terms of voluntary X or involuntary Y. Something that I’ve never seen, but which is theoretically possible, is propertarian anarcho-communism. All it would take is an anarcho capitalist who has a different definition of property… That’s all.
I think that Rothbard mischaracterizes the attitude of anarcho-communism, at least amongst its major theorists. He’s right that their economics are shit though.