They are not considered admissible evidence in court (but the criminal justice system still use them to a degree..), and they can be interpreted with intentional bias, so I think it's fine to share.
One of my psychology professors told me that if you hide something like a sewing needle in your shoe's insole, you can ever so slightly apply pressure so that the poke causes a physiological spike. They monitor for movement, so it has to be very minute. The goal is to do this on every control question so that they cannot establish a baseline and have to give up.