[Merv and Sharon]

I saw these number plate 'protectors' in the States' that were made from a plastic that was claimed to have a 'prismatic' design that reduced recognition of the number to only about 100 feet and not the 1000 feet needed for laser and radar and so on. This is all a mystery to me but do/could these things actually work? The more sophisticated the punishing/taxing authorities become in the use of cameras, number plate recognition, distance timing and so on, the more protective average drivers become.

Not that I would ever contemplate such and obviously illegal device!