In the cyberpunk world of post-singularity transhuman culture by Charles Stross, described in his books like Accelerando and Singularity Sky, the wish of information to be free is a law of nature.
Charles Stross, in his novel Accelerando, propels a small payload to a hypothetical brown dwarf star, 3 light-years away, using a Starwisp propulsion system, as well as using starwisps as kinetic-kill missiles against space-based warships.