It's a good point.
What I don't understand is - if the guy's point is to show how broken is the machine, why not make it as public as he could without revealing his identity or endangering his life? I can only assume that he believes that, by making more and more people capable of breaking the process, he'd show how broken the process already is. Fine, but - how many people will he train in his lifetime? 50? 100? 1000? 10000, if he loses sleep and stops living his own life? Even then, unless he trains convicted criminals, most people won't notice or will notice too late to correlate passing the "detector" and the undesirable behavior at the workplace.
What he does seems futile to me. Even ten thousand people is less than one percent of the US' population, and I doubt he can train more. Spending his time on neurological scanners might have been a better spending of his time if he saw torturing people as bad way to extract the truth - and that's just the way the uneducated me can think of it.