...I totally agree that there are many who say they are in the program, but have a very very poor understanding of it, apply it incorrectly and get into trouble. The naysayers then concentrate their criticism on those horses and point to them as examples as to how all Parelli is at fault....
I consider this a fault of most DVD trainers.
If a large number or percentage of people are not understanding your message, then maybe YOU are part of the problem. If Parelli thinks people are misapplying his teaching, maybe he ought to examine how he teaches.
Most DVD teaching I've seen make it look too easy, and doesn't emphasize how much subtlety goes in to training a horse. If you can't read a horse's body language, your training is going to suck. And the majority of DVD training I've seen doesn't make that point.
If you hire a trainer to work with you, they can show you what they are looking for in the horse's response. And if you spend hours teaching a horse a small thing, you begin to realize that a DVD is highly compressed and usually involves one or two types of horses, at best - but each horse is truly an individual.
I've recently watched a couple of DVDs from Larry Trocha. I think he makes it pretty clear that these are training suggestions, but they don't work on every horse and they don't work in 60 minutes. I haven't watched anything he has on training a colt, because that isn't my need.
Which brings me to another pet peeve: If you are watching a DVD on training a colt, you might want to reconsider training a colt. It is fine to watch one for ideas, but anyone who thinks they can learn how to break a colt from watching a set of DVDs needs to buy a horse with some good training first.
If lots of folks are misapplying your methods, you need to rethink how you communicate and market your method. You are either marketing to the wrong people, or not communicating clearly.