Courtesy of Salon‘s Andrew Leonard:

“Let’s file this one under the category of things we were reasonably sure were happening already, but are still greatly annoyed to have confirmed. New York City, reports Kashmir Hall in Forbes, has been tracking the movements of cars equipped with E-ZPass RFID tags all over the city — not just at the toll booths for which New York drivers presumably purchased their E-ZPasses to get through.

The surveillance was uncovered when an electronics tinkerer who styles himself  ”Puking Money” hacked his E-ZPass to, no joke, go “moo cow” each time it was pinged by a reader.”

Click through for the grizzly details.