Sorry Catfish, that is like the old "The M1 is bad because the enemy can hear the 'ping' of the clip, and know where you are, and that you are empty" argument. In the case of the M1, you just fired 1 to 8 rounds of 30-06 at them, so they already know where you are. And a good man with an M1 (I have seen several) can have it reloaded before the clip hits the ground.
(For the M1 it is a 'clip', not a 'charger', per Uncle Sam!)
As for quietly reloading, the Newhall incident was not the only one where officers reverted to their training, and pocketed their brass. There were other CHP incidents, along with comments by shooters like Skeeter Skelton.