Note the other thread on temperament. It was a known fact many years ago that Basenjis would bite first, ask questions later. Even today in the show ring, many judges feel the same way.
Just a couple of weeks ago, I was at a show in OR with a Canadian Judge. I had gone in and put Franie stacked on the table, as the judge approached she ask "Is she OK?", when I looked at her a bit funny and responded "She is fine, might kiss you however", the judge responded with, well not like the Basenjis in Canada, they bite first.
I was a bit surprised at the comment. I do have to say however that at least she approached the dogs with confidence, nothing bothers a Basenji more then a judge pussing footing around with the air of being scared to death of the dog.
And many behaviorists really only see the "bad" dogs, the ones that come from BYB that are not well bred, not socialized as pups, not raised by dog savy owners (and a dog savy owner can be one that is new to dogs or the breed, IMO… it is all what they learn and how it is applied).