The term FOIL, AS A PLAN can be summarized as a plan to derail or disrupt something. The term FOIL is an acronym for 'Frequency of Interference Law' which is a law that states that the frequency of interference between two signals is inversely proportional to the distance between them. This law is used in many fields such as telecommunications, radio engineering, and signal processing. The plan to derail or disrupt something would involve using this law to interfere with the signals of the target, thus disrupting its operations.