How about every driver has to answer a general knowledge trivia question, set by the fans before, before the mechanics are permitted to put tyres on in a pit stop.
Podium interview "......I felt pretty good out there and the car was working well but when I got three geography questions in a row I knew our chance at the win had gone. I'm actually pretty gutted I didn't get the capital of Peru correct because Peruvian F1 fans are the best in the world."
Many years ago there were banks in Singapore where when they closed for the day they let some of the rough sleepers sleep in the bank lobby. they then locked the doors for the night. That is imaginative security thinking.
Maybe Williams are worried about other teams stealing their secrets.