Because there’s no better misdirection than appearing to be a fool.

In the infamous Operation Midnight Climax, unwitting clients at CIA brothels in New York and San Francisco were slipped LSD and then monitored through one-way mirrors to see how they reacted. They even killed an elephant with LSD. Colleagues were also considered fair game for secret testing, to the point where a memo was issued instructing that the punch bowls at office Christmas parties were not to be spiked.