Well you need to do plausibility checks
And actually such augmented reality actually could, in theory, be possible if you extrapolate the technology we currently have, after all there's nothing absolutely impossible. You could, in theory, set up something like that with already existing equipment. It's just that often companies are simply not up to the task of doing it.
What I find more frustrating and noteworthy is that some people choose to believe other, more abstract, impossible things. For example some companies claim they can somehow build mobile devices that can store information "securely" without you entering a secure passphrase. This is obviously bullshit once you think about it. In order to encrypt and decrypt mass data you need to have some sort of a key. Now you either completely derive it from your passphrase (and some data being on the device), or you need to store it somewhere. All the data that's on the device can be read, even if it's on "security chips". All it takes is a moderate budget... which actually may be quite small for mass produced devices. (uncap the chip, add some traces on the FIB and you can brute force the PIN)