A Kickass Proxy is basically a site that let's you get back-door access to KAT. They'll make your browser look as if it's located in a place where KAT isn't illegal, masking your IP address and allowing you to enter the web. Sounds straightforward, huh? These places are coming and going because they're frowned upon. These pages are often frowned upon in most situations, which is why they come and go.