However, I'm not sure if the "plainly stated text" of Revelation really has such a clear and unambiguous interpretation. Compare Revelation 19:16 which also talks about someone having a name written on them, which I don't think anyone would take literally, and they certainly wouldn't the previous verse where a sharp sword comes out of someone's mouth to strike down nations.
You may not find these interpretations helpful, but others do, and it's fine to see things differently. Also, you're right that Roman censuses would be well known to individuals living in the first century AD, as was the practice of branding slaves, so these would be natural analogies for the writer to use to convey spiritual truths, and perhaps more complicated as-yet-uninvented systems.
There are lots of good arguments against the surveillance state or the idea of privacy as a fundamental right, reverse-engineering 2000 year old religious visions to mean something opposite of their plainly stated text (notwithstanding translation) is neither necessary nor helpful.
Need I remind you that the events of the New Testament start around the time of a Roman census, so the idea of individuals' own names being catalogued by the state was not an unfamiliar concept even back then.