I am from Philly and my biggest pet peeve are all of the abonomations that they I see called a Philly cheesesteak. A true Philly cheesesteak is thin sliced steak, possibly onions, cheese (american or whiz) on a crusty roll. Done. Why does every "Philly" cheesesteak I see advertised have peppers onions and sauce on it? That is not even close. And don't get me started on other cheese -swiss, mozarella, cheddar. I have even seen roast beef and cheddar sandwiches called a Philly cheesesteak. The worst is the new hot pockets Philly cheesesteak. Ugh.
Does this happen to any other regional foods?