Reply #2: One problem I see is that it undermines the rule "Always assume the gun is loaded and will fire"

[yellowcanine]

if the trigger is pulled. I can see kids pointing a gun at each other as a "trick", assuming incorrectly that the safety bullet is in place and shazzam, they just fired a live round.

Also - if someone does need to fire a gun immediately, are they going to remember that the safety bullet is in place? By the time they remember it may be too late - they may be holding a useless gun and not have time to remove the safety bullet.