Taken from Wikipedia:
Criticism and reactions
Paul Armentano, Deputy Director of NORML wrote an article about "Stoners in the Mist" [1], a recent ad campaign. Funded by the Office of National Drug Control Policy, the campaign feature cannabis users unable to perform even the most basic tasks such as moving, talking, bathing, and even recalling one's own name. Armentano has called the films "offensive" and "derogatory" for the use of stereotypes and "chock-full of disinformation."[2]
In 2006, the Government Accountability Office released the results of 5-year-study, concluding that the campaign was completely ineffective, and was even counterproductive, leading those exposed to an increased perception that others use marijuana, stating, "analysis also indicated that among current, non-drug-using youth, exposure to the campaign had unfavorable effects on their anti-drug norms and perceptions of other youths' use of marijuana-that is, greater exposure to the campaign was associated with weaker anti-drug norms and increases in the perceptions that others use marijuana."
I personally have no problem with the National Youth Anti-Drug Media Campaign trying to steer teenagers in the right direction. I can't say that these commercials have helped anyone or me, but at least their intentions are better. I have nothing against marijuana for use in a free nation, but let's not forget that it does have some side effects. I've met a lot of people who it has effected negatively. Such as drug dealers and kids who rely on it's effects. I also know people who spend all of their entire paycheck on marijuana as soon as they get paid.
Maybe if it were legal people wouldn't need to worry about getting beat up, shot, hustled, and even being caught by police, when purchasing the shit.