One might consider that the FBI and CIA are the kind of organizations to have people on their payroll who are actually told to go to Facebook and lie to a hiring manager, saying, "I used to work for the CIA." Whose record is it that the person no longer works for the CIA? Only if I blindly trust the word of an organization which is opaque by design do I believe it to be as simple as you profess.
To believe that, you must believe that the people who hired them at Facebook and Twitter are stupid. When these people are told to work for drug dealers or terrorists, they don't put the CIA or the FBI on their resume. Here, their former employment is out in the open. If they really wanted to get away with doing work for their former employer at their new employer, they wouldn't put their former employer on their resume.
>if you've completely ignored that they are no longer employed by the CIA
Once a nazi, always a nazi. Same with CIA.
You think feds & spies openly advertise their allegiances on LinkedIn or something?