There's a valuable lesson for them to have learned: don't put crap on your net. We have wifi vending machines here at work, they take credit cards and NFC, and I have no idea what net they are on, but I know my security people would not allow any device on the network without checking it out thoroughly. But then, we have a dedicated security team and run online and normal retail ops, so there's no way an infected vending machine is going to appear on my work production networks. At that mysterious university? Yes, there is a way. The staff are not equipped to do anything or say anything about those fancy new vending machines until AFTER they cause a problem. 100% this is "hey, just install the ice cream machines and don't worry about the wifi security, kid!" One. Hundred. Percent.