Any time you raise the voltage for any hardware it should be for a very brief period of time only.
You have been drinking again havent you? I guess everybody that overclocks and raises their voltage can only do it for a brief amount of time without killing hardware. Your so vague it ridiculous, I guess thats how you twist out of every statement you make.
Raising your voltage to to get a better overclock is not going to kill anything unless you raise it to a unbelievable amount just to see how far it will go or your insane. You can raise the voltage, I have on many computers over the years and left it there the life time of the computer and its never burned out any thing and have know many people that have done the same.
Most of your statements are true in a stand in the corner with a blanket over your head way, but in gereral not true.