Flattery is a two-way act to me, why else did you use the word? You basically said "accept that someone copied you against your wishes and just ignore it".
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.