Kids are becoming addicted to drugs by smoking "spice" in vapes
https://www.bbc.com/news/articles/cx92z0452jgo
Spice is cheaper than cannabis and kids are using vapes as a method of smoking it - some start of smoking spice then move onto harder drugs - spice itself is far more dangerous and addictive than normal cannabis hence why spice can be a gateway to harder drugs for some
Counterfeit cannabis-liquid (c-liquid) for e-cigarettes: Synthetic cannabinoids are increasingly offered in e-cigarette form as "c-liquid". Several schoolchildren in Manchester collapsed after vaping synthetic cannabinoids mis-sold as THC e-liquid
These drugs often labeled "not for human consumption" for liability defense. A large and complex variety of synthetic cannabinoids are designed in an attempt to avoid legal restrictions on cannabis, making synthetic cannabinoids designer drugs.
marketed as herbal incense, or "herbal smoking blends", and sold under common names like K2, spice, and synthetic marijuana They are often labeled "not for human consumption" for liability defense. A large and complex variety of synthetic cannabinoids are designed in an attempt to avoid legal restrictions on cannabis, making synthetic cannabinoids designer drugs.
More here:
Spice is a nickname for a substance containing one or more synthetic cannabinoids.
And the side effects mentioned on this sites aren't an exaggeration - these drugs are that dangerous the side affects are very real and documented
History
2008, the first synthetic cannabinoid – which reacts with the body in the same way as cannabis – was identified on the recreational drug market. JWH-018 was an aminoalklindole originally developed by John Huffman of Clemson University in the US and sold under the brand name: Spice.
http://pubs.rsc.org/en/Content/ArticleLanding/2015/AN/C5AN00797F#!divAbstract
These substances are produced on a large-scale by chemical companies based in China and then shipped, as bulk powders, to Europe by air or sea. Once in Europe, the synthetic cannabinoids are mixed with (or sprayed onto) plant material using solvents such as acetone or methanol to dissolve the powders. The combination is then dried, packaged and sold as either incense or smoking mixtures.
JWH-018 is now a controlled substance in many countries under narcotics legislation