They're not very tame dogs either. My cousin had two and a friend of the family had two (they died) and now have three. All of them were/are maniacs and that's after training. My dogs were calm and gentle, even with very young children but the Miniature Schnauzers weren't/aren't. My other cousin also had a Bichon and he was the same way as mine.
This is bullshit. A dog that is a maniac was not trained and/or socialized properly, simple as that. I have a schnauzer poodle cross and he is about the farthest thing from a maniac that you can imagine. This dog could play in a library. He has never barked at or shown aggression to another dog or person. He's not a fan of snowmen or Halloween decorations though; those will get a low growl.
edit - Too OP, I'm extremely allergic to dogs and any other animal really, but I have zero problems with my dog or any other poodle cross. That said, he needs a bath whenever he's been playing with other dogs cause I definitely notice it then.