Those who wish to smoke cannabis will be much safer with natural, locally grown marijuana plants. Synthetic THC pills may available for those who can't or don't want to smoke. Synthetic cannabis is a more acidic compound than the plant, does not have the same immediate effect, and can cause stomach problems from undigested pills. If you are going to use pot, go natural.
The idea of synthetic pot was supposed to be to make a socially acceptable way to consume a drug that mimics the effects of marijuana. Marijuana is already not addictive, but it has it's own short-term health risks. These brain-altering effects are just as prevalant in the synthetic version. The only argument that could be made is that it keeps you from smoking.