Types of stocks you avoid investing in (and the reasons behind them)

Like some investors, I don’t buy tobacco stocks. Even with the high dividends, I just detest smoking (not smokers; they have their own reasons for picking up the habit, and I’m not one to judge). Cigarette smoke is one of the most insufferable smells (not to mention how damaging it is to our health), and I want no part of a company that propagates it.