Quite literally none, as were learned when people like Gen. Keith Alexander were made to testify before Congress after the Snowden PRISM revelations. When asked how many terrorist attacks had been prevented, anywhere in the world, as a result of the dragnet surveillance the state carried out in foreign countries for over a decade, as well as the collection performed on USians by their spying partners at GCHQ and elsewhere, he first claimed 2 (perjured himself under oath basically). He later revised that down to 1, which they offered context for: They prevented a New Yorker, a taxi driver, from sending ~1000 USD to an individual in Africa who possibly had ties to Al Nusra or some similarly named org, a group which later shot up a shopping mall in, if I recall, Kenya.
All of them, considering all drugs should be decriminalised and the state should get involved in the supply side of eg cocaine, heroin, etc as has been shown to reduce harm and dependency across the board in all countries where it has been tried. Portugal successfully reduced violent crime by 50,% in the decade following their decriminalising of all substances across the board.
I certainly understand the need for an administrative body that can trace the spread of disease, since the original SARS epidemic this has been evidenced as an effective means of minimising damage to a population (and, as it turns out, an economy). There's no reason to so publicly advert your bootlicking fetish in the course of urging people to be sane though!