If some international dressage, arena jumping and 3-day trainers and/or riders dope their horses to win, the what the horse does in its class IS NOT REAL.
In a way this all reminds me of the plight of the Tennessee Walking Horse showing practices. Now I know that international riders no longer sore their horses (after all it is a bit obvious), but what they do with drugs helps to hide problems that their training systems cause to their horses: insanity from pain, just plain pain from overwork, muscle sorenesses that just won't work out, message out, chiropractic out, or saddle pad out.
Nobody should emulate these people's riding. No one should emulate these people's training methods. Since the horses were drugged, the show results are not real. If you copy them you could put yourself in real danger. IT IS NOT SAFE TO IMITATE METHODS USED ON DRUGGED HORSES. I would also hesitate to depend on products these riders &/or trainers endorse.
I do know there are true horsemen and women competing in these classes, and they loose because they are not hiding their problems behind drugs.
I would really appreciate some feedback on this.