They will use the polygraph to purposely disqualify anyone.  Every organization now is being attacked by the PC police for not having an equal amount of women, blacks, hispanics, muslims, dykes and faggots.  In fact, heterosexual Christian white males are screaming discrimination because they feel like they are no longer wanted.  When you take the poly, you are guilty until proven innocent.  You never know what the intention of the polygraphers may be.  That's why you should always here to the #1 rule when taking a polygraph, don't admit to anything!  They are just fishing for information to disqualify you.  Make them go back to their bosses and report "we did not get any confessions out of this guy/gal".  Then if/when they fail you, they have no basis, only suspicion without evidence.  And squiggly charts is NOT evidence.