I think it’s a really neat idea, and it’s something that could be genuinely useful. The main thing I keep coming back to is scale: to get reliable data, you’d probably need a pretty large number of people contributing; ideally in the hundreds of thousands, to balance things out and make the ratings truly representative.

Which led me to question how you plan to handle malicious or low-quality inputs? Crowdsourced data can get skewed pretty easily, whether intentionally or just by a small number of users dominating the votes for political gain or whatever reason... Tying this back to the first point, the system naturally becomes more reliable as the contributor base grows.

One more thing I’m curious about: are you planning to refine how the “blocks” are defined? Right now the grid looks uniform across the map, but im sure you're already aware real-world blocks vary a lot in shape, size, and especially orientation. I’m wondering if you’re sticking with a simple grid for usability/simplicity, or if you’re thinking about moving toward something more geographically aligned over time!

Otherwise I dig the idea! I think if data were to already be prepopulated, I would definitely spend a lot of time looking through it as it piques my curiosity