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well in that case, by listening to what they are broadcasting, i feel they are violating privacy laws.
I understand how you can feel this way, I honestly do. But keep in mind that it is not like listening through an open window. These networks broadcast across citywide ranges, and thus it is similar to someone shouting. A wardriver is simply listening for certain shouts, just like a child may tune out the word "no" but listen for the word "candy". Privacy matters not when it is placed into the open air on purpose, and with the knowing concent of the shouter.