I was bitten last year by a dog while I was sitting outside at a café table. The dog was on a lead. It was a Romanian rescue dog which, for the reasons already given, was much easier to adopt than a British dog.
The owner, an acquaintance, was almost as upset as I was so I didn't report the incident to the police though made it clear that if I had been a child the damage could have been dreadful.
She took the dog, which BTW is quite old, to the vet who told her it must be muzzled. I have never seen it since so it's no longer taken to cafés
I had to have 2 courses of penicillin as the wound got infected.
I asked why she took this poor animal in and was told, British dog charities insist on a garden and not an upstairs flat with shared garden which she has.
The dog, which was probably a street pack animal, would have had to be quarantined for months. No it's not rescuing at all, is it. It's cruel.
If you want to support these poor creatures why not give to a local charity which is dedicated to reducing the numbers of street dogs, and cats by controlling the breeding?