[lrem]

I used to use a competitor, https://www.oneperiodic.com/products/handsoff/. As far as memory serves, it had some kind of rule sharing, but I didn't like it at all (why would I trust rules made by someone else?)

One possible way to do this well would be displaying information about how many people blocked/allowed. Then maybe following the crowd if it is converged enough, e.g. ≥1k votes with ≥95% same decision. But, this might be technically and socially challenging (people who care about this level of privacy may not want to share their rules; you need to make sure that no malware developer can game the system; people need to trust in that).