alt Hacker NewsCan't help but imagine a reality where this is widespread and people resort to installing radio reflective curtains/decorations that freely move with slight ambient air currents in an effort to scramble the reflections and make it as hard as they can to measure.
Something like a belly dance belt around the router could also work.
Other options:
Humans who want some rooms of their house to be non-transparent will need either new construction or to retrofit shielding, e.g. QuietRock drywall.