Of course, it rarely works that way.
Humans fight back.
Consider it a peek through the ol' urinary tract keyhole into workers' private lives. In Canada, the High Priests of Urinal Augury lurk in the shadowy towers of the Toronto Dominion Bank. Last August, the bank was given the green light by the Human Rights Tribunal to force new employees to tinkle into tumblers. When you test people for only some drugs, you are testing people for lifestyle. In the U.S., piss tests are common.