Or perhaps they _are_ sharing notes about tor users with each other, as part of a global club of intelligence agencies (a sort of new world order) who would rather not be overthrown. How are we to know?
Basically, a variation of the prisoner's dilemma.
Also, those nukes we have pointed at each other are a pretty healthy hint.
"The simplest explanation is usually the best one."
Conspiracy theories are a logical reasoning black hole.
I personally feel it's generally best to avoid the mental Spaghettification.