The article talks about pumps that you have to pay before you fill, and also says the proprietor they interviewed said it would be a solution to drivers who fill up and don't pay, but you'd have to have all garages in an area doing it together, else yours would be the garage everyone avoids for being annoying, and you'd lose more trade than people not paying.
Some of the supermarket garages round here now pre-authorise up to £120,which is about double what my car takes for a full tank at current prices. Some are still under £100 though.
What happens if you prepay e.g. £50 and then your car only takes £43.72 of petrol before the microswitch cuts in to say you're full? Does it automatically refund £6.28? Some people must have experienced this to know. I have never filled up any vehicle with fuel overseas.