Oops. I forgot that.

Tangentially, regarding your other comment that surveillance systems are often set up in an ad hoc way, could you provide some references? This is quite interesting to hear.

I don't have a write-up on hand but you can get a gist of these systems by looking at the product page of one of the major providers: https://www.wwwscn.com/page/show/service.html

What isn't shown is that they also inject ads into web traffic and (allegedly) can be controlled like a botnet.

And what happens if I log in with someone else's phone number?