New Project Veritas: "DisruptJ20," A Collection of Leftwing Hate Groups, Caught on Video Conspiring to "Shut Down" Inauguration and Inaugural Events

One of the plans includes setting of butyric acid stink bombs in the Deploraball's ventilation system.

Mischief? Well, it wouldn't be mischief if people, mistaking the bitter chemical smell for a lethal chemical terror attack, panicked and fled the ball and wound up trampling people.