In the not too distant future it won't be sewn to your clothing, but downloaded to the microchip inserted at birth under your skin, containing all your medical, personal, employment and financial hsitory. The technology is already available, just awaiting acceptance by future generations. Scanners will read and track where you go, and no-one will think anything of it. But I couldn't live like that, and if makiing a fuss can delay it a bit, I'm all for protestiing!
Having read the wiki link, that still doesnt mean the above. You are missing three vital words. "It could be"