Hmm. Good idea about the proximity sensor/pressure mat. I've never seen anything like it but I'll do some searching. I had looked into kiosk type software but most of what I found was just a fancy gui for the local security policy. It always annoys me when people build software to control the features windows already has. I'll check out the link you posted though. I don't recall seeing that one. I'll load it up in a vm here shortly. There is very little in ways of documentation about setting up kiosks. There are more guides for linux than windows.