Hmm. I have no website activity listed - but seemingly every single Android game and a few other apps is sending "activity" to FB, despite me never using any feature to associate the two. This sounds like: https://privacyinternational.org/report/2647/how-apps-androi... Any sensible way of stopping this?
Both of these identifiers can be reset at any time via os features, making you appear as a new user (at least until fingerprinted or a new association with PII is made)