Just because it's against their ToS doesn't mean that their ToS is enforceable.
If you purchase a legitimate license to OS X and only use it on personally owned hardware that you keep in your possession (unlike that company that tried to sell Hackintoshes a couple years ago), it's very unlikely that Apple could ever have a legal case against you.
Your interpretation of the law is wrong. "Click-wrap" licenses have been held enforceable for over 15 years. See, e.g., ProCD v. Zeidenberg, 86 F.3d 1447 (7th Cir. 1996).
That said, I'd love to see a Blade Hackintosh (has it been done?)