The amount of words needed to fully explain this to tech illiterate idiots would be so many that those idiots would just argue they cannot be expected to read all of it. These people already do this with the terms + conditions documents they agree to.
Incognito mode did every single thing it said it did and behaved exactly as I expected from day one. Is there a single user here who actually was surprised by how it worked? Did anyone honestly think it was like Tor or something? Why? Where did anyone ever get that idea at all?