I voted that I love it, but maybe I misunderstood the question? I don't call all pit bulls "pibbles," just mine.....
I call Sally a pibble all the time, for a couple of reasons--first of all it's cute, and I think that she is cute, so it works out well for a nickname. Secondly, she is a generic "pit bull type." She could be a mix or not, and we don't really know, so pibble works well---"pit bull mix" is long to say, APBT or Amstff is inaccurate as far as we know, and if I describe her as a "pit bull," especially in dog circles, I am often told that there is "no such thing." So, she's a pibble or a pittie or a bully breed, or whatever.
As to whether the fact that I call her a "pibble" has any bearing on how I view pit bulls and dog/dog interaction.......Well, Sally does not go to the dog park, nor will any pibble (ha!) I ever own, does not stay out loose with Jack while we are gone, and I have spent tons of time and money (in trainers) working with her dog issues to help me help her be a better behaved canine citizen, so you tell me.......