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I disagree about children in poorer neighborhoods not being able to go out by themselves. I work in an inner city branch library in a midwestern city, and we usually have 15 to 20 unsupervised kids, ages 3-18, in the library at one time. Their parents are never with them. They run around in packs and are always there the next day to show up and use our computers again. They take care of each other, and also drive us crazy occasionally, but are very able to take care of themselves.