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Easy enough to set up a *nix box running samba (windows file/print sharing) and cups (unix print system) to do authentication (or just logging by MAC/ip/etc) and also accounting so you can give accounts credits for X number of pages, and bill for more... Also easy to set up authenticated 'net access, with degrees of control and allowance with transparent proyxing and creative use of dhcp.
Of course, network filtering (outbound access control) is easy to get around, with a simple ad-hoc network and a cell phone with a data plan...
And just for giggles, I'll mention there is paint on the market with metal particles in it, creates a faraday cage out of the room that gets painted with it, blocks most cell/wireless/etc ...
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“IN MY EXPERIENCE, SUSAN, WITHIN THEIR HEADS TOO MANY HUMANS SPEND A LOT OF TIME IN THE MIDDLE OF WARS THAT HAPPENED CENTURIES AGO.”
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