Cracked software can be made to install keyloggers that harvest accounts and passwords as they are typed, install back doors to use your computer for illegal activities, or download and hide compromising files on your system. Even worse, code can quietly siphon and filter intellectual property, including your design files (such as DWG files), which are attractive targets because designs can be sold internationally, patents in progress can be stolen, and progress information can be leaked or sold to competitors.