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QR codes 
@vaporeon_ what's wrong with qr codes?
@wallhackio Require an evil rectangle for scanning
@wallhackio Sure, or perhaps use a laptop with a webcam, but I'd much rather just type in whatever URL or data the QR code contains myself on the keyboard, that's quicker
@vaporeon_ I bet you could use a digital camera to take a picture and then put the picture on your computer and then use the QR code