While this *might* be relatively innocent tinfoil-hattery, it could also be an amazingly cost-effective example of asymmetric warfare (target the most gullible minds with a conspiracy theory that gives them an incentive to vandalize transport infrastructure): Pensioners attack Devon traffic lights over wild 'deadly weapon' claims An online movement say that the sensors on traffic lights can cause heart attacks, brain cancer, anxiety and even sudden death https://www.devonlive.com/news/devon-news/pensioners-attack-devon-traffic-lights-11148748