Oh , thats why we have x86 clones and apple
Makes sense ?

suns8630, Your source of information is your own experience. However, I have used a copy of Mac OS from a MacBook Pro and installed on *another* MacBook Pro. The information that the installer reads is *not* the serial number, but the machine ID. That's why you can't normally do it with differing machine ID.

Also, this is the computer industry we're talking about. Almost everything can be hacked

I'll repeat my question for clarity, where did you get this information from ?
Have you actually read the Apple license agreements? (http://www.apple.com/legal/sla)