I hate the "Dangerous Dog" labels, not because I'm some sort of fanatic but because they don't describe the dog or the situation he's in when he gets into trouble.
As a certified trainer I'm asked to work on hearings for guardians of dogs that have gotten into trouble. I see the same thing over and over:
Dog in yard....most of the time
Dog in yard not trained
Dog in yard not trained or socialized to humans they don't know
Dog left to his own canine "wiring" with no leadership or guidance, i.e. "uh, uh, don't jump on that man to greet him, sit first" - let's remember folks, dogs are animals they aren't bank executives for a reason, they need guidance
Dog with reproductive parts = desire to roam, to jump fence to leave safe contained area and uh, oh yeah, back to that no guidance thing!
We know that dogs left in a yard with their "parts" with little socialization and training get into trouble. Then of course it becomes a breed thing, wha? It's a DOG thing! No wait, it's and owner/guardian thing! How can a dog be left to decide and fend for himself then be blamed for it? Do we leave toddlers in the streets and say "ok honey, watch out for those cars now" ?? A case I'm working on right now is a Chocolate Lab case. So breed schmeed!
Guardians, spay and neuter your dogs, they're not dinosaurs going extinct. Keep them contained inside, preferably next to you snuggling. Train them, teach them, let them play with new people appropriate playmates, give them a good life, they deserve it.
Dangerous dog hearings are no fun and gawd, someone change that title to "My guardian didn't realize my fence was broken, sorta forgot about me in general, that I need training, socialization and birth control so I got out and didn't know what to do and got into trouble".