I'm just coming out my miserable experiences for your physical security of PC boxes.
When my wife had been very bad mood with me, she hated my time spending on PC,
So she might think PC as devils gear.
Then at first she had broken CRT monitor by a hand hammer.
The poor CRT had gone to heaven with some glass pieces.
Second time she had good info from her sister who had more PC skills than my wife.
She told my wife "If you wand to kill PC box, you don't need a hammer but just watering on
PC and push the SW on. It will work"
And it did work. The poor PC box gone to heaven with some baked smoke.
(Thanks god, Hard Disc device still saved)
Third time my laptop machine had been damped in a sink full of water.
And the machine had gone to heaven with some flash lightning.
(I had not seen it. My wife just told me the machine reaction in the water)
So guys please take care keeping good relationship with your girlfriend or wife to protect your PC box
and I hope you have a peaceful PC life.
All those nightmare incidents had given me brand-new PC box later. Thanks god.