One could even imagine genetic algorithm messages, where competing messages are sent into cyberspace and programmed to periodically recombine themselves using genetic algorithms: strong
parent messages eliminating weaker messages and recombining to give birth to an even stronger generation of messages -- strength being, for instance, measured by the persuasiveness of a message (number of people it motivates to act), or by the importance of the debate it generates (number of times it gets played back or developed).