I don't disagree with this at all. However, MA statute has specifically attempted to dissuade this type of activity. CHAPTER 268. CRIMES AGAINST PUBLIC JUSTICE
Chapter 268: Section 13A. Picketing court, judge, juror, witness or court officer
Section 13A. Whoever, with the intent of interfering with, obstructing, or impeding the administration of justice, or with the intent of influencing any judge, juror, witness, or court officer, in the discharge of his duty, pickets or parades in or near a building housing a court of the commonwealth, or in or near a building or residence occupied or used by such judge, juror, witness, or court officer, shall be punished by a fine of not more than five thousand dollars or by imprisonment for not more than one year, or both.
Nothing in this section shall interfere with or prevent the exercise by any court of the commonwealth of its power to punish for contempt.
Notice that the wording is vague enough that it can be applied to any picketing activity involving court workers.
With that said, one of my favorite memories of the fathers rights movement was one day in January when we maintained a presence outside and inside the Canton probate and family court, with a multitude of signs, purple flags hanging from every surface we could attach them too, and judges arriving for "work" that morning hiding their faces as they drove by us. I remember looking into Boorsteins eyes as she drove by and I held a sign in her face stating she belonged behind bars, not the bench.
None of us were arrested, or even spoken to, about this activity despite the ease they would have had in applying this statute against us.