[Adam]

Disagree with the safety factor on the kick; as well as the advantage. It's not soccer. A contested throwin would have the defender in danger if the thrower was allowed to punt the ball. Also, the ability to punt the ball would be a distinct advantage for a tired player or a player with a weaker throwing arm. Bring in your soccer star and have him punt the throwin down court.

If B1 was contesting the throwin and A1 decided to start swinging his elbows to back him off; would you call it? What if A2 started doing it, during the throwin, to clear space for him to receive a pass.

Finally, why is it a violation for B1 to kick the ball "during" the throwin if it's not a violation for A1 to do it?