A little story.
Way back in the day, I use to be a pusher of cinnamon toothpicks and paper in elementary school. It's not something I am particularly proud of either. But it paid the bills, you know--buying GI Joe action figures and such. Transactions by the water fountain with other shady kids who peddled Snickerbars, 3 Musketeers, Footballs cards, and all other illegal stuff-- it said so on the bag, not for use of sale individually.
Anywho-- I use to go to the local pharmacy on my bicycle to purchase cinnamon oil to make my product. I won't get into the dangers of riding said bike through the streets of Miami, however, I will admit I had to talk to the pharmacist himself to get the cinnamon oil that was kept behind the counter.
Cinnamon oil itself, at least the old stuff, not this new essential oil crap people push was rather caustic to the skin. If I wasn't careful with my little 9 year old hands I would end up with burns.
To make a long, needless story short-- I would never consider vaping this stuff. It scares me.