1. “Three strikes” laws may actually be increasing the murder rate, and not decreasing it.
2. Seat belt laws increase the number of car accidents, and increase pedestrian and cyclist deaths.
3. Banning the insecticide DDT almost certainly has led to more deaths, not fewer.
4. Teaching children not to talk to strangers (e.g. the “Stranger Danger Campaign”) may be making them less safe, not more safe.
5. The lengthy and costly FDA approval process might be causing more, not fewer, deaths.
6. Government regulations that reduced logging in America’s national forests (e.g. to protect the threatened northern spotted owl) may have resulted in more acres of forest being harvested worldwide, not less.
7. Increasing state cigarette taxes may significantly decrease government tax revenues, not increase revenues as expected.
8. Tariff on imports are passed in order to protect domestic industries and jobs from foreign competition, but often end up costing more American jobs than are saved by protectionism.
9. Vegetarianism may lead to an increase in animal deaths, and not a decrease.
10. Thanks to the efforts of animal rights activists, horse slaughter is now banned in the US. But that ban is very likely making the treatment of horses worse, not better.
MP: The Econoclass website also has some good resources for teaching economics (high school or college level) including debate topics, classroom activities, some brain teasers, some games and simulations, etc.