Individuals who alter, mask, conceal or otherwise attempt to defeat the results of a drug urinalysis test conducted under the authority of OPNAV INSTRUCTION 5350.4C are committing drug test fraud

USMC / USN members use drugs due to peer pressure, desire to be discharged, avoid deployment and because they want to

http://www.google.com/url?sa=t&source=web&ct=res&cd=1&url=http%3A%2F%2Fwww.usmc-mccs.org%2Fsubabuse%2F2006%2Fdownloads%2F1-3NCIS%2520Brief%2520.ppt&ei=yRnySb9vi_6zA6v8kPoK&usg=AFQjCNGJUmjx9tAOAt6x-fInMzU6KWd5wg

What if you borrow a stoner's piss and present that as your own, to get out of
deployment? Is that defeating the results of the pisstest?