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A comment on Cafe owners are pulling the plug on WiFi. Parent comment

Re:Cafe owners are pulling the plug on WiFi by zachkatz on Sunday April 30, 2017 @10:11PM (#14235100)
Maybe it's possible to jam the signal around a perimeter. Maybe not...yet.
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Re:Cafe owners are pulling the plug on WiFi by arkano on Sunday April 30, 2017 @10:12PM (#14235110)
Isn't that illegal?
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Re:Cafe owners are pulling the plug on WiFi by an_account on Sunday April 30, 2017 @10:33PM (#14235229)
If you're using an active "jammer", then yes it's highly illegal.

However, if you build a RF blocking wall, then it is legal.

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