For many educators, parents, and students, the internet has become the Garden of Eden, the ultimate resource, with the fruit of knowledge hanging from every tree.

Of course, there are the usual temptations, the rotten apples (that's a small "a," Mac lovers), and the occasional snake in the weeds. But beyond the purveyors of porn and the vendors of violence, one of the most obnoxious plunderers of the internet paradise has been spam.

Web users are learning how to get the spam off the menu. Firewall filters and browser blocks help, as have the internet service provider (ISP) policies that


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