Violation?

[Wondering]

This was originally my question which I posed to Just Curious who posted it. So I will clarify the situation.

A1 is making a spot throw-in from one end of the end-line. A3 is inbounds at the other end of the end-line. A1's throw is nearly parallel to the end-line and outside the end-line most of the time on it's way towards A3.

Can B2, standing inbounds (between A1 and A3) reach over the end-line and intercept the ball, which is still outside the endline, after A1 releases it?

If so, why should it be legal for B2 to intecept the out-of-bounds ball but no one on A's team (see rule 9-2.3)?

Along these same lines, another question is this: what does rule 9-2-2 mean when it says the thrower must pass the ball "directly into the court"? Has the thrower fulfulled his obligation if the ball is intercepted out-of-bounds?