In Q1103 1104 1877 2996

we were told that Facebook can listen without app being Installed

This is confirmed in the following two articles:

http://www.washingtonpost.com/amphtml/business/technology/how-facebook-stands-to-profit-from-its-privacy-push/2019/03/08/161a4c2e-4200-11e9-85ad-779ef05fd9d8_story.html

And Facebook doesn’t just use people’s information and activity on its platform, dissecting it to target people with tailored ads. ((It also tracks people who don’t even use the platform via small pieces of software embedded in third-party apps)).

https://www.businessinsider.com/facebook-off-duty-police-officers-firearms-offices-2019-3

Such stalkers are classified as "BOLOs," short for "Be On the Look Out," a category of person barred from all Facebook property. If BOLOs use Facebook or the other apps the company owns, the security team ((may quietly use data drawn from these apps to monitor their location without telling them)), as CNBC previously reported.

In Q 2984 2989

we are told (i think) that Facebook is C_A

(Although elsewhere it is darpa. The two (c_a and darpa, do not exclude each other)

Some indications of this might appear here:

https://www.businessinsider.com/inside-facebook-physical-security-protect-mark-zuckerberg-employees-2019-2

Like the rest of Facebook, global security is a ravenous consumer of data, slurping up vast streams of intelligence, which range from open source information to third-party data streams, from media reports about breaking news events to dark-web marketplaces that might be selling the company's intellectual property — and, of course, users' posts on Facebook itself.

….

It's an (("intelligence-based organization,")) trying to sift through a flood of noise to identify and mitigate issues ahead of time, and it identifies millions of "threats" to the workforce every year, from natural disasters to threats of violence against employees, of varying levels of credibility.

Atop it all sits Nick Lovrien, ((a former CIA)) counterintelligence officer who serves as Facebook's chief global security officer. Lovrien, who worked to tackle foreign-fighter pipelines in the Middle East, credits the early-2010s upheaval in the region as opening his eyes to Facebook's capabilities.