Silence is NOT golden...
Back in the 80s, I was on a coop term at a major telecommunications manufacturer. My assignment for the summer was to port a wire wrapping program from an DG Eclipse to an HP 3000. It was a very enjoyable exercise writing a converter from RATFOR to Fortran 77.
The factory floor was quite a noisy place with all the manufacturing equipment. Since I was new to the HP 3000, I spent a little time exploring. Discovered that as administrator, I could actually poke any memory location directly. I experimented with this...then noticed it was quiet --- too quiet. Panic filled my soul when I realized that the HP3000 I was poking on was the same one that ran all the manufacturing equipment -- and I had crashed it in the middle of the work day.
I learned NOT TO POKE memory on the HP 3000...