Let's take a poll......

[just another ref]

Originally posted by ChuckElias
As I've said in other discussions of this topic, the answer is A. Although the prohibition against crossing the plane specifically ends when the ball is released, nowhere does the rulebook say that the prohibition against touching the ball ends when it is released. Technical foul.

As supported by 10-3-12: "A player shall not reach through the throw-in boundary-line plane and touch or dislodge the ball...."

As Chuck says, this does not specify only before the release. I think this is a call that would be hard to make, (Ball in mid-air, which side of the plane was it on?)
but in a big gym with a lot of space out of bounds, it could
certainly happen, and when it did, the above rule seems undeniable to me.