While I would admit the "chachunk" is probably overrated by Hollywood and the like......
I think it it is an advantageous "by product" of the cruiser-ready condition (like XavierBreath so aptly put it). I'm afraid I'm very dismissive of this whole "give away your position" angle. I don't know what y'all were taught in your CCW classes, but vocalizing to the threat
while there is still time to do so was part and parcel of threat management. Obviously if he's standing over the bed your not interested in making threats or "chachunks". But if he/they are still in the other room, I think prudence, legal or otherwise, dictates the use of the "get the hell out of here" idiom.
The average punk will high-tail it. The absolutley zonked-out meth-head that is not in his right mind is going to do what he's going to do, "chachunk" or no. Regardless, the purpose of "chachunk" is not to demoralize them with the legendary, infallible, death ray effects of the shotgun. It's to convince them beyond a reasonable doubt that you are indeed armed, and not bluffing, and that is their cue to leave.
So yeah, it might be overrated, but in the main, I see no harm. I mean, if people kept it on an empty chamber for safety purposes, you wouldn't tell them not to chamber it?
Of course, if you are a member of the Super-Secret North American Action-Hero Ranger Squad, and live in palpable fear of Al-Qaeda ninjas with GPS-guided bullets that will home in on your position once you've "chachunked", then by all means, remain stealthy in your ambush position and do not vocalize or otherwise utter a peep.
You are, after all, good enough to ascertain the difference in footfall from your would-be assassins and your son/daughter coming home late.
