The very clear danger involves complacency arising from the use of this "safety bullet." The complacency occurs when the adult leaves the firearm unattented, wrongly believing the firearm has been rendered "safe." We all know firearms are never safe, at least not until they're a puddle of slag.
In the next step - a child racks out the safety round, as he's seen the adult do, loading a live round, which the child then fires, thinking it's still a "safety bullet."
One cannot rely on such simple technology to protect a child. One must maintain positive (not passive) control of one's firearms at all times, and that includes in safes, where one must maintain positive control of the keys with the same diligence as is used to maintain positive control of the firearm itself.
My safe has has two keys, one physical and one electronic. Both are required to open it. The only time I keep my firearm in my safe is when I'm away and not carrying, or when non-firearm-friendly visitors are present.
Otherwise, it's always in my reach.
It actually has a third key, in case the electronics lose power. In order to maintain positive control, I keep that key off-site, in a second safe owned by a family member.
If the base is one of my stops, I don't carry at all. I am not even allowed to lock the gun away in my trunk while on base. Possession is outright prohibited. (That needs to change.)
I agree that this state of affairs on our military installations is absurd, and it's apparently a recent and unfortunate development. When I was in the Q's, my firearms had to be kept in the armory, but when I moved into a house on base, regs allowed me to transport them to and from my residence on base. Now, after having served and defended my country and her interests with honor and distinction for more than twenty years, and having honorably retired, I can no longer defend myself on base? Even when I can do so everywhere else in the State and throughout more than 40 states in our Union?
Absurd!
And I dare say the military doesn't exactly have a very good track record of protecting people on base.
Back to the "safety bullet," in the video the only reason he used two was to demonstrate the slide lockup during the second half of the demonstration. It's actual use only requires one "safety bullet," so that the user would only have to rack the slide once.
Regardless, I do not view the "safety bullet" as "safe," certainly not if the firearm is left lying around.
Furthermore, I do not view this as "safe" in a conflict, unless one has always trained to rack the slide after drawing one's firearm. I carry in condition two, round chambered, full magazine in place, safety off, hammer down. I need only draw and fire, and that's the way I've trained for two decades. Should I ever begin using the "safety bullet," I would require some serious re-training, or I would likely draw, fire, and inadvertently disable my firearm, leaving me a target!
To me, that's not very safe.