Yes, let's blame our of our failures on a plant.
You stole from your little sister because you're a slimy punk, not because you needed the money to fuel your raging weed addiction. You got straight D's because you're irresponsible and/or extremely stupid, not because you smoked. You left your ex-GF 27 text messeges because you're a sexually repressed loser and/or sexual predator. You made your Mom cry because you're insensitive and/or came out of the closet, you callous dike. Not because of cannabis. You let your friends draw on you because you're a heavy sleeper and your friends are assholes. Stop blaming your problems on an inanimate object. Grow up and take responsibility for your shortcomings.
I don't find this add funny. It perpetuates stereotypes about recreational cannabis smokers--that we're all unintelligent, worthless, sleazy criminals. It might be amusing if a large portion of society didn't actually believe this, and if millions of my tax dollars weren't funneled into this shit. Fuck medical research right? So laugh it up. I guess sometimes you need to in order to keep from crying.