Thoughts on the issue from a few local Apple retail representatives who have collectively been invovled with the company for 20+ years:
"MarkTime"'s argument is perfectly valid, and if you were to disclose to Apple Computer that you're indeed running MacOS X on hardware other than Apple's, you *would* be admitting to software fraud.
But to rank "piracy" on account of a technicality (voided license) up there with the literal/traditional act of "pirating" software (as he does when making reference to piraring OS 4) isn't concrete support. Not that it's really needed. Mark is right either way, but I wanted to point out the weak brick in the fortress.
In any case, "Apple is in no possition to care, in the grand scheme of distrubution, sales, and share, if you're really going to run OS X on a true Mac box or other hardware. They're happy to take your money either way. Tell your Amiga friends to 'keep their lips sealed.'" (Quote from regional distribution manager who will remain anonymous at her request.)
If you want to come to a compromise, install Apple's Darwin only.
(And remember that issues in life are not always 0 or 1. And SSRI's do wonders for obsessive compulsive disorder.)