They mostly have their own network available, and easily enough crackable. If you're really determined you can pay some kids to break the cameras and wait for the tech to arrive to fix it over the next days and then capture all her network traffic..
Then find out you can control the cost/litre at the pumps via some awful soap api.. That's talking over the internet anyway..
I think this is actually done at least on ATMs. I have read it's a good way to get the pin number for a card, as you might be able to see someone typing it in. Some of the skimmers I want to say even had a camera aimed at the keypad?
