I have never heard the cry come up for an all-out ban on toy breeds and mini terriers. Wait, they're the cute harmless little itty bitty dogs... everyone knows they're never dangerous and/or aggressive. I guess when they do it, it's the particular dog and not the entire breed. Funny how that doesn't apply to rotts, pitts, etc.
My daughter is now two, and her best friend, our 80 lb rottie, has never shown any aggression towards her. But Ursa sure has shown aggression towards the mini-schnauzer (who runs around the neighbor hood off-leash and menaces dogs and neighbors alike). Oh, and the black bear that came onto our porch one night. Apparently, my rott doesn't like black bears either.
No bears here in the hill country, but Husky girl loathes raccoons and stares up at them in the trees, barking and howling until she is dragged away indoors-she does not realize that those raccoons are big and from eating purloined livestock, pet and people food and can tear her to shreds. I hike in the woods across the road after work a couple of times a week and I've never seen even any cougar tracks-I think it is because there are 14 homes on this road, making it too populated for their liking (thank heaven). There have been quite a few loose dogs killed by cougars near some of the larger ranches nearby, though-most recently two standard poodles whose owner had been told to keep the dogs inside the fence and fined for not complying-it is a shame, nonetheless.