In an age in which cybersecurity is top-notch, sometimes all it takes for hostile intelligence to gain a treasure trove of information is some old-fashioned espionage tradecraft -- like finding an insider. In a criminal complaint filed Nov. 5 in U.S. District Court in San Francisco, the FBI accused two former Twitter employees and a third man of acting as agents of the Saudi government in the United States without declaring themselves. Two of the men, Ali Alzabarah and Ahmed Almutairi, are Saudi citizens, while the other, Ahmad Abouammo, is a U.S. citizen of Saudi descent. The men are charged with helping the Saudi government identify political dissidents and others on the social media platform who were critical of the government and Crown Prince Mohammed bin Salman. I've already written on the case for Stratfor's Threat Lens clients, but there are some important lessons in the affair for a wider audience...