I think a lot of people have a bad taste in their mouth for DA's because of the examples that get the attention, either bad (in fact or perception) cases or the legitimately bad individuals or areas which get highlighted e.g. CA, IL, or NJ. You don't hear about nice pitbulls and rottweilers either. It is a squeaky wheel case, but just like all prejudices there are enough bad examples to substantiate it or it wouldn't hold up like it does.