@Marko, why do you believe this to be true? I know that polygraph operators prefer that subjects be ignorant of polygraph procedure. But this is because those who research polygraphy will learn that it has no scientific basis and that it instead depends on trickery (with the operator lying to and attempting to deceive the subject).
I have found no peer-reviewed research that in any way suggests that a person’s knowledge of polygraphy could “skew [their] natural reactions and cause [them] to fail.”
On the contrary, a person who researches polygraphy can learn to avoid certain behaviors that might be erroneously construed as attempted countermeasures (such as breathing slowly and regularly in an attempt to remain calm) and learn other behaviors that can mitigate the risk of a false positive outcome.