RIM patent stops texting while driving while forcing it at the same time
block a driver's phone from sending or receiving radio signals. As we told you, a low powered radio jammer would be able to block the driver of a vehicle from receiving and sending out messages while allowing others in the car to do as they wish. Back in 2009, RIM seemed to have another solution. It was three years ago when the Canadian manufacturer of BlackBerry devices filed a patent application that has just recently been granted by the USPTO for a technology that prevents the user of a device from writing a message, as long as the phone is moving at a certain rate of speed.
While this certainly sounds like a great idea, in typical 'RIMsian' fashion, there is a major drawback to the whole thing. The problem with this idea is that to override the lockout, the driver needs to answer a CAPTCHA challenge which means having to type out a word while presumably driving a vehicle, thus forcing the device's user into doing the very thing that the patent is designed to prevent. It's a Catch 22 situation and probably explains why we haven't seen this on any BlackBerry model.
source: USPTO via Engadget