A black mirror imaginary theory is as follows:
Here is the thing, different party (bis and govtn) holds part of your privacy. Which means that there is no "God" entity that can both use state tools and financial tools to attack your personal social circle. With this, now there is.
For most people, it is not a concern because you are insignificant. However, if you some people such as those in govtn agencies or high rankers in ministry, high rankers in MNC and all that are now subjected to this. Which means that as long as you are an individual with ability to influence, the "God" entity can now know where you went (by estimation of who you met) and in a case where they need you to do something for them, they know how to compel you to do it even if you are as righteous as captain america and has no dirt on you. How? Your friends and family are certainly not free from dirt, even if you are.

Also, with such information, it is possible to dismantle your influence within a ministry, within a party and within a company. Just do a simple shuffling of chair and you can be stranded.

This leaves the common people with a lack of champion and deter any possible champions from stepping up.

Of course, let's hope someone break into one of these device to ensure that it is really as private as it sounds. But even then, it's not hard to find you. It is common for HR workshop to tell you that you are 3 - 6 linkedin connections away from connecting with a ceo. If that is true, it means that you are 3 - 6 device away from being summon by law to submit your bluetooth.

Of course, all of this are fan theories from black mirror and I don't think it is going to happen in real life. Hope you don't too.