This is an article along the lines of the "Bong hits for Jesus" article. In this case a grade 10 honor student who vows no prior drug use has been suspended from a high-school in small town Saskatchewan, Canada and was forced to miss a final exam over his research paper that compared the harmful effects of alcohol, tobacco and marijuana. In his paper the student discussed that marijuana is the least harmful (healthwise). He was reprimanded for this accurate portrayal of the scientific evidence and cited as encouraging drug use.Link
I would be the last one to defend our radical-conservative Supreme Court, but it's worth noting that even the Bong Hits 4 Jesus opinion would protect this Canadian student (if he was in the US). SCOTUSBlog quotes Alito's controlling concurrence: "I join the opinion of the Court on the understanding that ... it provides no support for any restriction of speech that can plausibly be interpreted as commenting on any political or social issue, including speech on issues such as 'the wisdom of the war on drugs or of legalizing marijuana for medicinal use.' ... I regard [the regulation at issue in Bong Hits 4 Jesus] as standing at the far reaches of what the First Amendment permits." The Chief Justice's opinion appears to agree.