Earlier quoted context omitted.
You don't see any difference between physical property and source code? I can't wait until you find out that sufficiently old intellectual property goes public, while sufficiently old houses don't go public! Have fun blaming that on me splitting hairs when it wasn't my idea. More seriously, intellectual property is a number of different things lumped together, and they serve different purposes. Copyright exists to en…
So the splitting of the hairs you're attempting is to point out that IP typically expires at some point, and therefore we should all consider anything "old" as effectively having expired IP, regardless of whether that's true or not. Blizzard's IP hasn't expired, your argument here holds no water.
By the way, I'm not making any arguments about morality. I'm just pointing out that IP is different from physical property in important ways.