While I'm not saying it's not fun to try and run OS X on PC hardware, can anyone explain to me how this is not morally equivalent to unauthorized copying / software piracy, given that they are both violations of the license agreement?
Apple also forbids virtualising OSX on non-Apple hardware. So you can't run your OSX (which e.g. you bought legally) on VMware on Windows PC. So yes, formally this is illegal, but it is about common sense - when you feel that it is wrong to forbid such things - you happily "break" "law"...
If you bought OS X for non-Apple hardware, it has never been able to run there unmodified. It would be like complaining that my PS4 game doesn't run on the XBox One.