Player Control?

[canuckrefguy]

If B1 is "under the basket", it's a no-call all the way!

Players cannot stand underneath the goal and not expect to have contact if A1 dunks. If A1 has a clear path to the hoop, he is entitled to shoot and land however he wants. If B1 is in his way, that's his problem.

Look at what the NBA did with the semi-circle around the hoop; the rationale is the same, except the NBA put the "no-foul zone" even further away from the hoop to account for the athleticism of the players.