“To open Pandora’s box” means to perform an action that may seem small or innocent, but that turns out to have severely detrimental and far-reaching consequences. 
The recent death of a student who jumped to his death in Colorado after ingesting a marijuana cookie is waking many up to what is really being unleashed in the misguided pursuit of marijuana legalization.
In her article in the LA Times, Jenny Deam sees a precautionary tale in the recent death last week of a student who jumped of a balcony after the effects of eating a marijuana cookie kicked in.
Many of her statements reflect the narrative of those who are looking beyond civil liberties, beyond nostalgia, beyond the false dichotomies of justifying another addiction-based vice industry with the evils of two others — tobacco and alcohol — to the downstream realities of legalized marijuana.
“The case has become a grim exhibit in a growing case file as Colorado health officials wonder whether, in the rapid rollout of legalized marijuana, adequate attention was paid to potential health risks of its use”