The government aren't very smart then, using that as a shock tactic just gives us, the weed smokers, another reason why it should be legal (quality control and all that...).
Since the government has been getting aggressive towards cannabis, they've shut down several importers and raided houses where it was growing.
Now the nastier drug dealers have taken to splicing in other substances in order to make their cannabis heavier, namely glass fibers, which, when smoked can potentially be fatal! People have gone to hospital over it.
This has been used to promote the dangers of cannabis. Is it really the right thing for the government to do, though?