And people wonder why we sometimes look askance at the future of the human race.Internet griefers descended on an epilepsy support message board last weekend and used JavaScript code and flashing computer animation to trigger migraine headaches and seizures in some users.The nonprofit Epilepsy Foundation, which runs the forum, briefly closed the site Sunday to purge the offending messages and to boost security.”We are seeing people affected,” says Ken Lowenberg, senior director of web and print publishing at