[I.M.O.G.]

Um, I think that is a bit overboard.

If you don't screw with voltages, you'd have a hard time breaking anything permanently by overclocking. You could possibly scramble some data on a hard drive, but you'd have a hard time causing physical damage to any of the components by modifying the frequency alone. Usually you'd just bluescreen or fail to boot, then reset bios to defaults.

That said, I agree you should know what you are doing before you just go flipping switches... But actually, if you don't touch voltages, the only thing in real danger is possibly losing some data from a borked hard drive.

You can't set your computer on fire by overclocking either. You might make a little smoke, but actually catching fire is not going to happen.