I've destroyed a Logitech Illuminated Keyboard with my head, which I replaced with another of the same (I love this keyboard). I was very frustrated in BFBC2, which lead to numerous slams and head butts. Then I plied off the R key, which broke the tiny plastic hooks and I could not replace it.
My Logitech G5 Laser mouse is a quarter dead from a lot of banging on to the table. I'm more afraid that I'll destroy my toughened glass table than the actual mouse, though...
If we look at the past, as a very frustrated 15 year old (9 years ago - frustrated at the Worldcraft map editor for Half-Life), I slammed my right hand (Tae Kwon Do technique) into my CRT monitor, which utterly destroyed it. A piece of glass had ripped into my hand though, which left a pretty nasty hole. It's now a scar I can tell a story about, though!
Other than that, I'm alright!
I did used to have a nasty habit of punching the side of my computer's case when I was around the same age as when the CRT incident happened. I guess I just wanted to destroy the HDD.
But anyway, like I tell my wife and friends - I do not hit people, I destroy inanimate objects with my extremely short-fused rages.