Maybe places like parking garages would have some mounted where a person wearing one of these might walk by, but the significantly small numbers would make any junk data insignificant. So, I cannot imagine these being useful to that end. Other cameras like traffic cameras or toll boths or similar mounting locations would also not be hampered by these shirts unless you make them into a complete body wrap for the car.

However, I do see them being useful as conversation starters when someone asks WTF you're wearing. It would have a much better chance of increasing awareness of ALPR tech and possibly other camera tracking tech in general. But even that is pretty much meaningless in the grand scheme of things.