This is illegal and not in use by legitimate ad companies. They've learned their lessons [1] [1] http://www.zdnet.com/blog/btl/ad-network-at-center-of-third-fl

This is illegal and not in use by legitimate ad companies. They've learned their lessons [1] [1] http://www.zdnet.com/blog/btl/ad-network-at-center-of-third-flash-cookie-lawsuit/38346 http://www.zdnet.com/blog/btl/ad-network-at-center-of-third-...