So I guess you should click "Allow" in the first facebook-designed prompt, to trigger the second Apple iOS level system prompt, and click "Don't allow" there, t

So I guess you should click "Allow" in the first facebook-designed prompt, to trigger the second Apple iOS level system prompt, and click "Don't allow" there, to actually register the do-not-track request to be enforced on the OS/API level? If you just click "Don't allow" on the first FB screen, it doesn't look like iOS will know about the do-not-track preference at all?