At Kenosha, as the Jury is deliberating and even before, Protestors Outside the Courthouse ought be removed back behind a half-mile radius. So the Jury does not hear the accompanying noise. I would think they are able not to truly concentrate on their duty to return a verdict. The Protestors might also disruptingly sway one way or the other the Jurors Opinion of the facts.
If they would break the half-mile boundary, the penalty ought be sixty days in jail and charged for all meals.