> there is just no consistent way to block "tracking calls" vs. blocking requests needed for particular pieces of functionality and data

At some point, browsers will gain firewalls and packet inspection and filtering capabilities.

We should be able to inspect the data sites are sending and receiving asynchronously via Javascript. We should be able to automatically delete or redact private information from JSON payloads. What if uBlock Origin could automatically anonymize unique identifiers that some Javascript code is trying to exfiltrate?