Why not? I want to record me going, "Muwahahahahah, foolish mortals!", Barney's "I Love You" song and Disney's, "A Pirate's Life For Me!" so I can play them every time you go into a system.
I just realized though that no one else would have the sound files...darn.
I guess it would just be better instead if the developers were advised to add custom map sharing to Sins of a Solar Empire: Rebellion in place of this idea.