Also, keeping secrets is no big deal. Every family has them. Every school has 'secrets' that they don't tell the children. Every company board has 'secrets' they don't share with the staff or the outside world.
As for personalities and the need to keep different persona, who really is the same person at work as they are in their private life? It is not hard to compartmentalise your life and be a different person for work.
However, ultimately, what these agencies are up to is quite sick and twisted. They are not out for the common good. Some of the psychology behind that could be a better basis for an article.