That's right. I had the pleasure of meeting up with Lee Spector post-libreplanet (I also had the pleasure of meeting up with Gerald Sussman during LibrePlanet... both conversations were interesting, and I keep meaning to blog abou the ideas that came up during them). During the conversation I realized that PushGP could be a really interesting system for a distributed anti-abuse system. Imagine if your anti-abuse programs were both adaptive, and able to propagate their good features by "breeding" with the programs of your friends...