Yes, I know bad bad people can also use the .fla files for dastardly deeds (the dreaded hypothetical "Nazi Porn Version” that always comes up at Q&A's). Bad bad people can use our shared Language and Technology for evil too, but I'm not going to constipate culture out of fear of imaginary worst-case scenarios. I'm confident much more good will come from this than bad, and that's motivation enough for me. It's Free Culture, baby. If programmers can tinker with the Free Software's source code, artists can tinker with Sita Sings the Blues‘ source files.