Externally, every (non-God) system and agent is a machine. Internally, every (non-God) system and agent is a person. The question is just the relevance of the external sense versus the internal sense.
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Personhood is inherently a religious belief, in that it is relying on a certain model of cause and motive that strictly speaking is not necessary versus speaking mechanistically about phenomena. Intent supposes consciousness, which we understand to be a, uh, hard problem.
The reason why we can treat some entities as things and are punished for treating other entities as things is because our model of the thing is insufficient for containing and using that thing. (God *could* treat us all as things; yet he loves us! What great love!)
the surprise conclusion of the machine consciousness debate will be that people are machines.