Ballobots are used in the Cybertronic sport of basketrek. They are said to enjoy bouncing, the higher the better, unlike human comic book writers, which don't bounce very well.
The alignment of ballobots is not known. Perhaps they are found to frequently shift their allegiances, as Earthen golf balls and other sports equipment are often accused of doing. Ideally, however, they should certainly remain neutral, in the interests of fair play.