Hackers infected an epilepsy message board last week, posting messages designed to induce seizures and migraines, Wired reports. The Epilepsy Foundation shut down its forum as reports rolled in. One woman said she suffered her worst episode in a year: “I don’t fall over and convulse, but it hurts,” she said. “I couldn’t move and couldn’t speak.”
At first, the Internet griefers posted animated gifs, but a day later added flashing graphics to attack photosensitive and pattern-sensitive epilepsy sufferers. “Everyone who logged on, it affected to some extent,” said one victim, who experienced a day-long migraine. About 50 million people have epilepsy worldwide, and roughly 3% suffer seizures at the sight of flashing lights.