The next time your traffic-enabled GPS notifies you of an "incident" along your route, you may want to do a quick virus-scan before taking the next highway exit. Turns out hackers at the CanSecWest conference successfully proved they were able to send bogus traffic and weather messages via RDS out to traffic enabled devices.
Annoyances aside, there are some pretty serious safety / Homeland security concerns around keeping real-time traffic data secured. For example, there's a traffic alert code reserved for notifying citizens of a terrorist attack. Erroneously sending out a message to thousands of motorists that there's been a massive terrorist attack could cause mass-panic as drivers frantically try to flee the area.