Sir,
This is a sweeping generalization. Not to mention that it assumes an awful lot. Assuming that an individual is somehow defrauding his or her students or being otherwise dishonest simply because they add techniques from outside of their system into their curriculum is much further than one should go without knowing the individual in question.
In the past many masters went to other masters to pick up techniques outside of their given system and then integrated them into their own system without learning the entire system from which those techniques came. A good number of systems that we call "traditional" now began this way. Because they have proven to be effective systems over time, how they acquired the techniques in the first place is not questioned.
Consider hapkido. Think about how Choi Yong Sul would be viewed today if he tried to found hapkido with the same story about his background that he gave back in the forties. He would be accused of rank falsification (nobody can verify that he studied under Takeda) and branded a fraud. Something for a hapkido practitioner to consider before accusing someone in another system of somehow defrauding his students and creating craptastic MA simply because are looking to add some grapples to a striking art.
Your major protestation seems to center around the video/online backed up by seminars method of crosstraining. Had he asked about going to a hapkido school to crosstrain, I doubt that this thread would have taken the direction that it has. There are certainly a good number of potential pitfalls in this approach, all of which have been enumerated on both this thread and on others.
Daniel
