for decades ppl smoked it, no problems, now "medical" mj gets a first step, and this crap happens. someone laced it with some crap on purpose.
Even if it were laced. If someone contracts salmonella from chicken and dies as a result. Do we say they had chicken poisoning?
If they were actually hospitalised from the consumption of marijuana then they should label whatever trace of substance that actually caused them to go to hospital should be named. I can quite guarantee they weren't in any life threatening or potentially damaging situation as a result solely from the THC.
Unless of course they have mental issues, marijuana, being a psychoactive drug, isn't usually the best for some people with mental issues.
If being high requires an emergency call these days. I am quite sure hospitals would be overflowing.