well mama dog was definitely pure, and she was scarred up. The male that I've seen off and on on that trail had a longer nose like Blue, but he looks pure too. I'm not sure if dad isn't a curr mix, or if he's even the dad. But he stays in the same place I found mom and pups.
It is true they bite more, but like Moabite says it's not exactly their fault. They're just popular among certain groups, and they are the mose over bred breed (at least in my area.) Out here there are very few places they are outlawed, mainly in apartments by the college.
I always tell people Blue is a rescue, tell them his story, all while he's laying on his back getting attention from them. Only half stick to their opinions and a few are open to listening in on why the breed is how it is. I've seen (personally) more GSD's and Heelers, who are family bound and protective of their people, bite than a good bully. That doesn't mean I am going to never own them, because these are my three favorite breeds. I just know to take special precautions with them, and to watch closely for their clues on being angry. I actually have a picture of my Heeler with a bowl of food, teeth showing and that "look" in her eyes at the cats.
Again, I know there are a LOT of bad dogs out there. But it's not how I raise mine. My heeler was also a rescue, and had been being trained to guard so that's just how she is. Blue was raised a family pet surrounded by screaming and playful kids, and he's the friendliest dog in the world. He injured his tail last month (and I can't make this up) he was wagging too hard.
It's all in how they're raised. Want to do stereotypes? Fine. But don't get mad when I defend MY dog because YOU instantly think he's out to kill you. Look at that face? And those big brown eyes... He doesn't want to bite you, he wants to lick you to death. And then lick you some more, and get his belly rubbed and a treat for doing good.
Blue does "smile" though, where half his teeth are showing and his eyes are squinting. But his whole body is wagging and his tail is going a hundred miles an hour.