At prior jobs we would put similar language in our privacy policy, not because we did anything with the data, but because we didn't want someone to claim we vio

At prior jobs we would put similar language in our privacy policy, not because we did anything with the data, but because we didn't want someone to claim we violated the policy due to how web browsers worked. Either you trust Facebook to follow their privacy policy or you don't; short of auditing them there is now way to validate otherwise. If you are really concerned about this why not use a browser extension that randomizes your HTTP headers?