Advertisers love them, but drivers and residents around Boston say that billboards made with light emitting diodes are irritating. The billboards -- which flash signs about low mortgage rates and podiatry clinics -- are far easier to switch around, thereby cutting their costs and improving ad churn. Advertisers say that drivers pay attention to them too. But they aren't popular, according to the Boston Globe. (As a side note, because there's less paper involved, the signs are arguably more eco-friendly than paper billboard and far better than neon.) "It's like trying to watch TV driving down the street," Craig Bower, 40, of Beverly, told the Globe. The best ad is one for Eliot Sherr, a podiatrist. He flashes big pictures of bunions and in-grown toenails. "Limp In. Walk Out," reads one ad.