Open source is, in general, a friendly, giving, and even forgiving community. That, however, isn't always the case and if you understand the legal framework under pinning the licenses, it's possible to spin the open source world on its head -- for better or for worse. We'll cover the basics of open-source licenses, but, more importantly, we'll be delving into the darker side of open source licensing and some of the opportunities for the open source when you throw in a healthy dose of the hacker spirit.