My internet is playing up, so I can't see the image, but I can only assume that you are talking about those white plimsoles with the LED strip running around the bottom.
If so...
A) Both. I read about them being availible at a local supermarket. I have also seen a couple of kids running around with them at my previous job - I used to work at a laser tag site - and it was pretty cool given the surroundings (lots of bright lights and LEDs).
B) Absolutely not. Frankly, in everyday life, If I was walking through the city wearing those, i'd look like a tosser. They'd probably look cool in a nightclub, or something similar, but they really aren't my style.
C) Kids, definitely. I'd imagine cosplayers would get some use out if them, aswell.