Most titles are bullshit.
Theres always going to be at least one thing that seperates any given person from the definition of the word they like to use to describe themselves. If I wanted to, I could register the domain name voluntaryistfacts.com and claim all sorts of stuff about what a voluntaryist TRULY believes in, but would that make it any more valid than anything else? Is there some supreme being, way up on high that came down to earth from voluntaryist.com and banged his gavel, decreeing "I hereby set in stone that the term voluntaryist means X and Y, and all others shall be cast out!!!" I mean really, who defines that stuff? I could easily claim that by voting to abolish all forced government keeps me within the realm of being a true voluntaryist, right? I suppose you could counter-claim that its not truly voluntary because im forcing my "no government" way on people that might want a huge government, assuming my vote wins. See, its all grey area bullshit.
I say just call yourself whatever you feel gives the closest description to your beliefs and requires the least amount of long-winded explanation to make it clear to people what line of thinking you follow. In some circles, I call myself a Libertarian. In others, I call myself an anarchist. Sometimes I say "Im a small government guy....really small government". Depends who im talking to.
I've never called myself an Anarcho-capitalist though, for the simple reason that very few people even know what the fuck that means. They think of robber-barons or pirates, raping and pillaging the land for their own benefit with no regard for others safety.
People that know me best know im a idontgiveafuckwhatyoudotaryist.
If you meet the stringent requirements to join the club, you can be one too!!