reading
http://www.howstuffworks.com/anti-shoplifting-device7.htm

I wondered how common source tagging is: state of the art or no. How would the industry source-tag earrings/videos/ computer-software as is claimed in that article ? Must be the packaging right ?
Can they already hide magnetic tags in cardboard material itself?

I did notice tags woven into a label in the neck of shirt (shop in amsterdam): that it ?
does anyone know about this ?
thanksfor info