Because they are really, really bad for you. Fake pot has seen a rise in popularity lately, even though the possible side effects of it sound more PCP than Purple Haze. A recent study in the scientific journal Analytical Chemistry detailed the awful possibilities.
The substances produce a “high,” but also can cause a wide range of dangerous side effects including seizures, hallucinations, severe kidney damage, psychotic behavior and heart attacks.
You know what doesn't have any of those risks. Real pot. So smoke that. And if you can't score any, smoke nothing. Drink a beer. Now say it with me because we all need to make this pledge: I will not light on fire and inhale the fumes of something I got in a plastic tube at a gas station.