. For about 3% of the 50 million epileptics worldwide, flashing lights and colors can trigger seizures. "'I don't fall over and convulse, but it hurts,' says [an IT worker in Ohio]. 'I was on the phone when it happened, and I couldn't move and couldn't speak.' ... Circumstantial evidence suggests the attack was the work of members of Anonymous, an informal collective of griefers best known for their recent war on the Church of Scientology. The first flurry of posts on the epilepsy forum referenced the site EBaumsWorld, which is much hated by Anonymous. And forum members claim they found a message board thread — since deleted — planning the attack at 7chan.org, a group stronghold."