A state appeals panel on Wednesday sanctioned a Chicago attorney a third time for filing frivolous lawsuits and threatened to report him to the Attorney Registration & Disciplinary Commission if he continued to do so.The 1st District Appellate Court levied additional sanctions against Dennis James Stolfo, owner of Stolfo Law Offices — who has not paid the $184,993.53 in sanctions he already owes — and harshly criticized his “vexatious and delaying behavior.”“It is abundantly clear that …