Judges have broad powers when it comes to making custody and visitation orders. But one woman claims a judge demanding she not speak with her children about her ongoing divorce violated her due process and free-speech rights. It’s a case the Illinois Supreme Court agreed to tackle last week, and it stems from visitation instructions given by Cook County Associate Judge William Boyd during a divorce proceeding. After litigants Catherine and Raymond Eckersall couldn’t agree on an initial joint custody and …