When I was a kid my dad installed a gate on our garden and intentionally left it too long so it'd scrape on the floor whenever opened - it made a noise like scratching a chalkboard but still opened with relative ease. I asked why, he said if anyone tries to break into the garden they are gonna make a lot of noise opening it. About a month later someone tried to get into the garden in the middle of the night, woke us all up, and we saw a would-be thief running off into some bushes out back.
To this day, every house I live in, I do exactly the same thing. No idea about ninja floors, but the idea of intentionally building things badly for personal safety doesn't seem farfetched, given we actually did it, and it actually worked...
TheJoshGriffith t1_iu501kc wrote
Reply to TIL about anti ninja floors in Japan. They were purposefully made to squeak as to alert people of intruders. by tpb01
When I was a kid my dad installed a gate on our garden and intentionally left it too long so it'd scrape on the floor whenever opened - it made a noise like scratching a chalkboard but still opened with relative ease. I asked why, he said if anyone tries to break into the garden they are gonna make a lot of noise opening it. About a month later someone tried to get into the garden in the middle of the night, woke us all up, and we saw a would-be thief running off into some bushes out back.
To this day, every house I live in, I do exactly the same thing. No idea about ninja floors, but the idea of intentionally building things badly for personal safety doesn't seem farfetched, given we actually did it, and it actually worked...