Originally Posted by johnny d

The problem is that pointing to the RA indicates the play would have been a PC/charge if it happened outside the RA. Pointing to the RA gives your partners the opportunity to provide information regarding the location of the defender, that they would not provide if you just call a block. If you are then presented with evidence that the defender was indeed outside the RA, you are going to have a hard time justifying not changing the call to PC/charge and explaining to the coach that it would have been a block anywhere on the court, you were just too lazy to use the correct mechanic.