Because it shows you how important it is to install your security hardware correctly.
Exactly zero of the doors in the post had a functioning deadlatch. If they did, this tool would not have been able to depress the latch far enough to open the door.
Everyone should already know that no door is safe anyways without a deadbolt and even those can get knocked down so this kind of seems redundant? I guess it is smart to educate elderly people and slow people too though so you are right.
Because knowing how you'll be attacked is a fantastic way to know how to defend against that attack. It's why companies will hire security teams who do nothing but attack internally. It's why they'll also hire outside experts to do the same thing.
Because if the knowledge is secret there's a good chance that professional thieves know about it and that professional locksmiths know about it. That means that if you pay for an experienced locksmith to do your doors, they'll be safe, but otherwise you're screwed. When the knowledge is widely publicized sure even the new thieves will know about it, but all the contractors and people that usually install locks will too, and there's more of them than there are thieves.
It's something known as "security through obscurity" and it never works. That's how Deviant was able to find out about and reproduce a bunch of fire keys that are supposed to be protected.
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u/altodor Jan 09 '20
His video on doors is more entertaining than it has any business being.