Does Google FLoC track your porn preferences using the ad blocking EasyList ?
The FLoC draft has a section about sensitive information. You are invited to read it but I will summarize it here: FLoC can and will reveal sensitive information, we cannot surely prevent that because it's difficult, fuck you.
I searched in the Chromium open-source FLoC implementation how sensitive information was managed. The draft says "As a first mitigation, the browser should remove sensitive categories from its data collection", but I have not found anything doing that. I may have missed it though, it's a huge codebase, and I would gladly be proven wrong. However, from my understanding of the current implementation, any website with ads or using the FLoC API gets FLoC. It corresponds to what the FLoC draft says "at the adoption phase, the page can be eligible to be included in the interest cohort computation if there are ads resources in the page, OR if the API is used."
The list used in Chromium to identify ads is based on EasyList, a list created and maintained by people to block ads. It's a bit ironic that Google uses the work of people blocking ads to track people for advertising reasons.
