There's also the related observation, demonstrated in Eric Frank Russell's Wasp [1], that merely leaving behind the signs of tampering is enough to cause fear a

There's also the related observation, demonstrated in Eric Frank Russell's Wasp [1], that merely leaving behind the signs of tampering is enough to cause fear and panic. In the novel, which is written as a deliciously dark satire in the vein of Kurt Vonnegut Jr., a single agent causes havoc in a foreign country by subtly creating evidence of a mass sabotage by an underground guerilla force: Spreading rumours, distributing provocative stickers and posters, leaking assasination target lists, strategically leaving surveillance equipment to be discovered by the authorities, and so on. He doesn't actually perform any acts of sabotage. If Wasp had been written in 2019, flying drones at airports would have fit right into the narrative. [1] https://en.wikipedia.org/wiki/Wasp_(novel) https://en.wikipedia.org/wiki/Wasp_(novel)