I think it's a good idea to understand what does "free" software means and why it matters (or does not matter) for you and your community.

Check the course Syllabus: http://vrepin.org/FreeDigitalSociety/index.html E.g., I remember times when I was confused in selecting the proper license for my software projects, for my photos etc. And this is good to know which licenses and in which cases and for which purposes are used.