Exactly this. Pot is probably the most common and it stays in your system for 30 days after use (probably the longest that is tested). Essentially the screen will fail a guy who smoked pot two weeks ago, but pass a guy who shot up heroin all last week. Like the polygraph test, they are deeply flawed, in this case, for testing for intoxication.
Also, imagine if drug tests failed an applicant for having a beer in the last 30 days. Like it or not, pot is replacing beer for a large portion of Americans, time to adapt.
Exactly this. Pot is probably the most common and it stays in your system for 30 days after use (probably the longest that is tested). Essentially the screen will fail a guy who smoked pot two weeks ago, but pass a guy who shot up heroin all last week. Like the polygraph test, they are deeply flawed, in this case, for testing for intoxication.
Also, imagine if drug tests failed an applicant for having a beer in the last 30 days. Like it or not, pot is replacing beer for a large portion of Americans, time to adapt.