People are just as wary of new associations. If you meet someone new, are you not just as wary? Imagine you are having an interview for a new job, and the interviewer came and stood or sat too close to you, would you feel comfortable? These poor animals are somewhere totally strange, are absolutely terrified and just don't know what the heck is going on. Of course they will react, by the only way they know. Growling, backing up, and being defensive. Wouldn't you if you perceived this unknown person as a threat? Animals in their own home and environment will react to strangers, (even if their own personal humans are there) coming into their little dog-dom, does this mean that these dogs too have failed the aggression test? I personally do not like unknown people coming into my space and will back up if they come too close, then if they continue, I will take a stance that would be deemed as aggressive. Dogs need a better test then a stranger wanting to see their aggression. I will agree with you that some dogs are a threat, but we must give the dog a chance to prove itself. A kind word, a smile and a friendly hand out could maybe give a perfect dog another chance to be loved, as all of dogs want. If the tester is worried about the friendly hand being bitten then the tester is in the wrong business. Vets are in the business and have sometimes got a nasty bite, from FEAR. Please reconsider your thoughts and put yourself in the dogs paws. I do not have any dogs being a kittie person myself. But my heart breaks for the "no-chancer" because of this doubtful, unreliable, test.