I'd have no problem with televising executions. In fact I believe they should be. If we as a society are unwilling to accept the blunt truth of what capital punishment entails, then we shouldn't have it. However, charging money to see an execution? I think not. Certainly not for the purpose of making money for a private enterprise.
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I think that this would make capital punishment more of a deterrent to capital crimes. Our notion of execution is very abstract. If people saw executions, some might think twice before causing trouble.