Police are reporting that the number of accidents caused by listening to, watching or just plain fiddling with, entertainment devices when driving cars is on the rise. Drivers get distracted when looking for the right track on that slippery iPod and end up going into the back of other cars. Of particular concern is the use of headphones when driving — and they are especially needless given the range of devices available to wirelessly link your MP3 player to your car stereo.