They dont work. I can tell you that straight up cause i still get your ISP assigned IP address when you post on this site. Yeah you may get a new one assigned after unplugging your modem. But as soon as you enter this site your IP is logged and i can find it. There is nothing software wise that stops your outgoing IP to the world from being changed or masked. We can tell if it is a Proxy or not as well. There are just as many sites out there to trace your IP as there is to find it. Those tricks are only temporary.