This problems have already been solved.
Zcash is far away from being full privat its just opt-in privacy and not privat by default. And the structure that Zcash is a company is not good
The recent events regarding the twitter files for example or the knowledge gained from snowden clearly show you that intelligence agencies worldwide are everywhere to be found where social activities are taking place
It should be noted that the killing was conspiraed by FBI Agents where some of them also stealed a bunch of bitcoin for their own interest.
It's nowhere mentioned cause it would put the Feds in a bad light