This is the most ridiculous thing I have ever heard. My dog Harm is an Alaskan Malamute/Siberian Husky/Labrador cross. He looks like a Malamute with dorky lab ears. He is rambunctious and very strong, but he is also very loving. According to this, my dog would be one of the "dangerous" dogs. Also, some people mistake him for a wolf hybrid because he looks like a Timber Wolf with lab ears.
My Maddie is half Chow & half Lab and they would have to pry her out of my cold dead hands!