[JesseK]

If one read the safety literature on LiPo batteries and then observed the types of practices put into use at competitions from the bottom 5% of least-safe teams, it would be easy to make a substantial argument against LiPo batteries for competition use. Simply put, it's very hard to trust all of our neighbors when a small mistake will be very costly (or painful).

Plus the GDC would have to amp up the requirements on battery placement/protection on the robot itself, and we all know the last thing we want are more design constraints.