At the height of my career in the mid 70's, I was using a fairly aggressive body position (BP) for the time.
I was out practicing one day and as I was going through a big, 180 degree banked turn, I noticed a rider on the infield of the turn. He had several other young riders in tow, and every time I came by, he would point me out to his entourage.
When I came back to the pits he came over to me and proudly stated that he was teaching some newbies by showing them how I was using my knee to steer the bike through the turn. I smiled and thanked him for using me as a good example of how to ride and walked away. The only problem was that he was 100% wrong in his interpretation of what I was doing. What I was doing was using weight transfer to straighten the bike up to gain ground clearance to keep the pipes off the ground. He was interpreting by watching, assuming he knew what I was doing, and then coaching the newbies with incorrect information.
There is no substitute for experienced in-house instruction with expert racers/instructors who can explain techniques and be onsite to answer questions and critique students while on the track. The Ed Bargy Advanced Riding Technique School does that all that and more.
For additional reading click on “History of the Evolution of Aggressive "Body Position” which, was written by an expert racer who was actually there and involved in the development of effective BP.