In another episode, Mad ran a mock ad for "J. Edgar Hoover Tonic": "Special agents go to work in seconds, cleaning out your system and getting rid of all those harmful foreign elements ... and you'll be pleased with what it does to your red cells!" An agent was promptly instructed to contact the magazine "and firmly and severely admonish them concerning our displeasure at the tasteless misuse of the Director's name."
The best thing you can say about this is that it is a profound waste of the agents' time. It is also, of course, official harassment. It may not be the worst abuse of the FBI's authority, but it is among the most telling -- not just about Hoover, but about unrestrained power in general. As voices in Washington (and elsewhere) call for cutting the restraints imposed on the FBI in the 1970s, you should reflect on stories like these. Those restrictions were put there for a reason.