In one of the local traditions, the voters in the state all assemble in a town square to vote in person. (this year they exceptionally used ballots)

https://www.ai.ch/politik/landsgemeinde

In the old days, every voter was given a special sword, and admission to the gathering was conditioned upon possession of the sword (my former landlord still has his, it might still be a requirement).

Would it be possible to develop some sort of equivalent, but as an antenna rather than a sword, reflecting on wavelengths illuminatable from the ground and observable from the air, that would allow popular votes to be taken via spy imagery? Presumably confirmation would involve multiple independent drone captures...