A little sensationalist story. A bigger risk I see is that if anyone can get their hands on the key or duplicate then fake an ID, with a different photo they could easily empty it. I.E. at my regular branch they may know me, but where my SDB is they might not. It was pretty tough for me to not take the extra key and put it into the SDB. I just didn't want an extra floating around that is not in my pocket at all times. I still consider it.
I'd be afraid to keep hundreds of thousands in metal or valuables at my home unless I had some serious security measures in place, alarm systems, safe encased in concrete, etc.
I still change my home locks maybe every other year, I just had a family member walk away with a spare set I let them borrow to get back into building when they went to their car. You don't know what they are doing with that spare set, or who might have access to them. I've seen drug/gambling addicts get pretty creative pretty fast, very sneaky, some can be surprisingly clever in ripping people off, I've even seen family members pull off some pretty good shenanigans on each other. I had this one girlfriend ask me, should I borrow my sister 5 thousand dollars, I'm like hah, why would you do that, you know her game, she had just got done stealing her grandmothers identity, emptying her accounts, then took out a loan for 10k with her good credit, was good credit. I said no, she asked her pastor, he said yes, $5k long gone. And, she wonders .. why won't this guy marry me.
Safety of SDB is brought up pretty often on different forums, many use them, they just know they can't keep their neighborhood or home locked up as tight as a bank vault. I think they are good for storing a limited amount of cash as well.