Whistle in or out during free throws?

[fiasco]

Originally Posted by jTheUmp

Where are you positioning yourself as L that the ball could carom off the rim and hit you? I get wide (and deep, if there's space) enough that I think it would be nearly impossible to get hit by a free throw that touches nothing but the rim.

It was the first shot on a two-shout foul, and I was positioned next to the low block. I've been told by some evaluators to stand there and by some not to stand there.