I came across this slightly foolish idea in Scott Cunningham’s book Earth Power. It’s an awesome book which I highly recommend. However, in his section on fire magic, Cunningham quite seriously implies that burning a sample of tobacco as a symbol for the problem of smoking is a good idea. I got a good laugh out of it. Sometimes,
For the symbols think a moment – if you overeat, take a portion of your favourite food and throw it onto the fire. Smoking, drinking the same.
It could be worse, he might have suggested drinking the alcohol!

“No I’m not smoking. I’m just burning this cigarette as a magical symbol of my desire to quit!”