It is dumb because it is implausible. If I further explain it involves more people and I'd rather not. Basically, I passed near an airport and mentioned how they probably had a radio that could hear us. That morphed into another delusion I occasionally have about being able to hear radio waves from various sources such as helicopters, airplanes, radio stations, etc. That turned into another extremely improbable delusion, that they would monitor me for the day and of course do a background check.