Everything has negative to go with it... if you drink too much water, you can cause your heart to stop (electolyte imbalance and fluid overload, and all that jazz). As far as the short term memory goes? I can handle forgetting things once in a while, after all, I'm only human.

But there are ignorant people, especially some young teenagers who smoke because it's "cool" and don't respect cannabis. Those are they stereotypes that are automatically placed on all of us stoners, unfortunately. In my eyes, that is the only true negative part of cannabis. The rest is simply inconveniences.