Ok so we used to breed paints so whenever I see someone call a pinto a paint when it is not a paint I always scream in my head.
What is a Paint?
A paint horse is a breed of horse that can be any combination on thoroughbred and quarter horse bloodlines. Note that not all registered paint horses are pinto either, many can end up solid without a speck of white on them. For a horse to be a paint it must be either be a thoroughbred or a quarter horse that is a pinto, or a horse with at least one registered paint parent. A paint can also have a parent that is a registered quarter horse of thoroughbred and another that is a paint, and still be registered as a paint.
What is a Pinto?
A pinto is a horse that have large patches of white on their body with any other color horses can be. A pinto horse can be any breed of horse because pinto is a color and not a breed with defined genetic background. Yes many paints are also pintos, however not all paints are pinto, and not all pintos are paints.
So it always drives me nuts when I read a description like. "Black and white paint saddlebred for sale." or something of the similar.
So random color lessons with Zada.
I'm not sure why you would "scream".
Remember if you would, that APHA is a relatively new organization - perhaps not by your standards, but I was 15 when it was formed, so it was not like it was back in the "olden days". In conjunction with that, Paints, at least as a "breed" are a very new breed, and in the opinion of some, myself included, are actually more of a "coming" breed than an established breed because they still permit outcrossing.
Yes, I think there is a distinction today between a Pinto and a Paint as far as terminology goes, however because the breed has not yet been stabilized, it shouldn't come as a surprise that many people still refer to Paints as Pintos.
While I think it is appropriate for Paint folks to point out the difference to educate people, I also think many of them are a bit thin skinned about the whole thing when it is perfectly reasonable and understandable why some people don't make the distinction or know the difference...