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Department of Unintended Consequences
Studying unintended consequences is one of my favorite topics in economics. Here's the first installment 
Quote:
Uncommon Knowledge - The Boston Globe
A rigorous statistical examination has found that smoking bans increase drunken-driving fatalities. One might expect that a ban on smoking in bars would deter some people from showing up, thereby reducing the number of people driving home drunk. But jurisdictions with smoking bans often border jurisdictions without bans, and some bars may skirt the ban, so that smokers can bypass the ban with extra driving. There is also a large overlap between the smoker and alcoholic populations, which would exacerbate the danger from extra driving. The authors estimate that smoking bans increase fatal drunken-driving accidents by about 13 percent, or about 2.5 such accidents per year for a typical county.
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"So little pains do the vulgar take in the investigation of truth, accepting readily the first story that comes to hand." Thucydides 1.20.3
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