Belle Noir, I believe most of the people who posted on this thread work hard at training their little dogs and do not allow them to do whatever they please.
It is often said that Yorkies have 100 pound dog attitudes wrapped in a small package. Yorkies often end up being top dog in homes where different size dogs are present. Yorkies typically have attitude; they are known for being feisty (which is what made them good ratters

). I think that is the spirit that this thread was intended. Not all Yorkies fit the profile, and it is not just a matter of training.
I disagree that the Yorkie mauled by pit bull(S) would have stood a better chance if it had been properly socialized. You are making a lot of assumptions there and placing blame on the Yorkie. I think that case was human failure, allowing the Yorkie in the back yard with the 2 pit bulls.