It's worth noting that AIP's functionality requires you to trust Google -- the data is received by them, but their design specifies that they mask it before it's processed or stored.
While I feel we should all treat Google with skepticism here, I didn't realize they (and so failed to acknowledge) that Homebrew was attempting to remedy that, so I apologize for speaking out of turn.
> The Google Analytics anonymous IP setting is enabled i.e. 1 (https://developers.google.com/analytics/devguides/collection...)