I definitely would not smoke cinnamon. Those oils are quite harsh and could be VERY irritating to your lungs.
With the wealth of flavors that occur naturally in cannabis, you can find a strain that has what you are looking for, and then enhance it by fertilizing with a carb synthesizer and sugar supplement.
Hint: You like cinnamon? The classic BOG SourBubble, when grown outdoors in New England and harvested on September 15th, then properly cured, has a cinnamon aftertaste...