If it was anyone but Palmer, my assumption would be that it is satire. However, since it is Palmer, my assumption is that he did actually build enough of it fo

If it was anyone but Palmer, my assumption would be that it is satire. However, since it is Palmer, my assumption is that he did actually build enough of it for it to be lethal if fully armed, and that it is genuinely a tribute to SAO rather than a warning about VR.