Scientist have smoked mice out, to the point that they died. No real world chance it will ever happen though to a human.
Weed can be addicting, from personal experience, stopping cold turkey after years of chronic use, resulted in irritability and loss of appetite, and a feeling similar to a constant adrenaline rush, with shaky hands. For me symptoms lasted about 1 week, after that, I felt fine and had no cravings for the green.
I would imagine it would be harder to give up coffee than pot.