Henry, the (vicious) Bearded Collie shown here in 'attack mode' on the left, we had to get rid of because he was a 'vicious dog'.
My Mother had him & Charlie (right) playing in a tennis court when a guy with a dog walked by. Henry jumped on the gate, it opened and he got into a fight with the dog. The guys shorts were ripped, but we didn't know by which one. My Mom reimbursed him for his shorts, and his dog's trip to the vet for 'checkup'. He still filed a complaint, and the restrictions were well beyond absurd, so we had to find him a new home.
Perhaps we should have sued the city for faulty public facilities. I don't think that a tennis court gate should be able to be opened by a dog, after all.
My Mom used to buy into a lot of the 'pitbull & vicious spin'. Not anymore, after this.