It's actually an addiction not a habit.Biting your nails is a habit, cracking your knuckles is a habit. My advice to Bonham is to quit while he's young, the longer you wait the more addictive it becomes and it gets harder and harder to quit I know from experience.
R.J. Reynolds Tobacco Company:
While these ingredients are approved as additives for foods, they were not tested by burning them, and it is the burning of many of these substances which changes their properties, often for the worse. Over 4000 chemical compounds are created by burning a cigarette, many of which are toxic and/or carcinogenic. Carbon monoxide, nitrogen oxides, hydrogen cyanide and ammonia are all present in cigarette smoke. Forty-three known carcinogens are in mainstream smoke, sidestream smoke, or both.