> It's protecting the buyers from frauds.
> Parmigiano-Reggiano is made in Emilia Romagna, in the
Parma-Reggio (Emilia) area.
> That's the only real deal.
I think this distinction is silly. I don't think the region the product came from matters much. More specifically, I believe certain regions claiming "this is only the real deal if it comes from here" are being chauvinistic, or maybe just trying to protect their local economy.
Champagne is equally silly as Parmigiano-Reggiano. And there are many more similar regional trade-marks.
You cannot call your search engine google because of (among other things) trademark law. But this is not a regional trade-mark. Its because you are impersonating a different company.
I actually favor normal trade-marks. They are the most reasonable form of intellectual property.I believe customers need to be protected from products pretending they are from a different company. This allows them to hold the company responsible. It allows them to judge a product by the reputation of the company, and it allows the company to build a reputation.
I do not believe customers need to be protected from products claiming to be from a region that 'makes the product special'.
It seems to me that, regional trade marks are not so much about protecting the customer, but instead about protecting the region economy or prestige.