"Hacktivism" is the practice of defacing Web sites to make a point. It happens dozens of times every day. This is Future Tense for December 10th. I'm Jon Gordon. Anthropologist William Taggart at the University of Arkansas has been studying why hackers hijack Web sites and replace front pages with their own messages. ((q/a)) William Taggart at the University of Arkansas. For an archive of defaced Web sites, visit the website alldas.de. That's www.a-l-l-d-a-s dot d-e. ((button))