People don't like ANCAPs because of the "anarchist" bit? Colour me fucking shocked, Batman. Its almost like anarchism is complete bullshit, betraying a person's complete, fundamental misunderstanding of the purpose of having an effective governing body.
Though, I agree that anarchists shouldn't vote. After all, voting is tacit support of government, and government isn't the solution to (some) problems, government is the problem and now you have cholera.