I can see your point generally, but in this case, I can't see how being copied is anything other than flattering. It means the idea was good.

Regards your second sentence, that is what I'm saying. A large company that's put lots of resources into something fighting of another company who "stolen" their idea, while tedious, makes some sense. For an individual, I can't see how it's worth the time, stress or money to worry about copyright.