For sale: Systems that can track where cellphone users go around the globe

The USA has already killed people based on trivial amounts of data such as, "A had dinner with B who is C's relative. Thus even though A is US citizen in a foreign country, we will blow up his car with a Hellfire missile fired from a drone because C is a known terrorist."

   Verint, which also has substantial operations in Israel, declined to comment 
   for this story. It says in the marketing brochure that it does not use 
   SkyLock against U.S. or Israeli phones, which could violate national laws. 
   But several similar systems, marketed in recent years by companies based in 
   Switzerland, Ukraine and elsewhere, likely are free of such limitations.
   
   At The Post’s request, telecommunications security researcher Tobias Engel 
   used the techniques described by the marketing documents to determine the 
   location of a Post employee who used an AT&T phone and consented to the 
   tracking. Based only on her phone number, Engel found the Post employee’s 
   location, in downtown Washington, to within a city block — a typical level 
   of precision when such systems are used in urban areas.

I have the opposite concern. There's really not much that Iran can do to an American citizen continents away. The NSA, on the other hand, can target, track, and detain me without any recourse.

slides from CCC in case someone is interested.

That said, it would be quite nice to have an open API where I could query an area for the count of cell phone users active there. Of course this should have upper and lower bounds on the area, perhaps on its shape too. I emphasize that it is just count that I seek, not querying the location of a specific cellphone.

Is anything like this available, free, for a fee, for specific providers ?

Would that thwart this particular tracking?