Smokable herbal blends marketed as "legal highs" have become increasingly popular and as easy to buy as cigarettes.-CNN
The blends of exotic herbs and other plants have been sprayed or coated with one or more chemicals that, when smoked, produce euphoria. They are commonly labeled as herbal incense to mask their intended purpose. These contain drugs that are dangerous and should be illegal.
"K2" is a brand name for a dried herbal blend that can be smoked. It produces a high similar to that of marijuana but doesn't contain tetrahydrocannabinol (THC), the psychoactive chemical in marijuana. Instead, K2 contains synthetic chemicals, known as JWH-018 and JWH-073, that mimic THC by acting on the cannabinoid receptors in the brain.
I don't do drugs but this right here seems a good reason to legalize marijuana if only to get people to not do this synthetic crap. Its just scary that this kind of thing is legal.