Would you have done it different?

[PSidbury]

Originally Posted by WreckRef

He looks at me, then shoots it.

Agree with Snaqwells... technical foul, turn and go report it (someone else will get the ball).

Originally Posted by WreckRef

A3 reaches across the plane with both hands hindering B1 from moving along the baseline.

Yes, this is the second DOG in game, and not requiring a warning, per se. However, I probably would still blow the whistle and "remind" the players about the throw-in plane. Of course, if it is abused after that, the T's start flying.

Originally Posted by WreckRef

... gets down the court and with B2 standing perfectly straight up, A1 decides to jump into him while attempting a 3 pointer.

Probably a no call. Would have to see it for myself.

I don't know if you have a pre-game with captains or the teams at center court, but part of my pre-game has always been (even at HS level), "Gentleman/Ladies, the referees are not going to chase balls. We cannot turn our backs on the court or players and we won't , so please keep the game running smoothly by retrieving the ball if you are closest to it."
Of course, I say this in a nice manner, not trying to give a "holier-than-thou" attitude.

Good luck !