Ive seen a few like that also. Most of those situations are owner induced even when they don't think or know so.
This is SO SO SO true. I've been working with and training dogs literally my entire life and dogs are SO much smarter than people think. Anything a dog has learned, both good AND bad, is directly related to the people in it's sphere of influence. Most people aren't nearly as good at "reading" dogs as dogs are at "reading" people.