You asked if I knew of a better way to prevent crime, well my way is certainly more effective.
You can prevent a rise in crime without restricting specific groups of people. otherwise, you are punishing innocent people for the actions of others.
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If you mean soccer, believe me, I wouldn't. If you mean American football, I prefer to watch it on television. Of course, if I were to go to a stadium, that should be a mutual agreement between me and the owner of the stadium. No government involvement is required.
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"Necessary" is a subjective term. To others, imprisoning the entire human race seems necessary.