Insanity

The Virginia Tech shooting is something out of Hollywood. One guy kills 32 kids. There are all sorts of issues here.
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Gun control. When our Constitution gave citizens the right to bear arms, the technology was such that an expert marksman could fire two rounds in one minute... and accuracy of the firearm was not at issue. The cheapest Saturday night special outperforms this exponentially. You don't need an automatic weapon for protection.
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Time for gun control. Even in the Wild West, the Sheriff used to tell the bad guys to leave their guns out of town.
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Anyone who murders anyone is insane. There are many forms of insanity, and it is unlikely that we will ever be able to prevent insane acts from occuring. Anyone who is intent upon killing himself in the course of killing others is virtually unstoppable.
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Keep access to firearms away from these people by barring them from society. Screw the NRA and the Hunting lobbies. Give them fishing rods and bows and arrows. I'll take an overpopulation of deer over 31 dead Virginia Tech Hokies.