The Profile Of A False Martial Artist Impersonator

Martial Arts or what I like to call it; the self scientific study of body motion and spirit is a positive challenge depending who you choose as a teacher. Hopefully, your teacher will have an affect upon your willingness to be your own person pointing you to the advantage path leading you to the development of your own style.
If you stay with your chosen form or style long enough and your teacher is a real one, eventually its virtues will become known to you.
There is a problem however. There are a lot of impostures posing as instructors.
In Washington State where I was raised just before my teen years to adult hood, there were few martial art institutions to be found. But in 1973 when Bruce Lee passed on martial dojo’s started springing up everywhere. Many claimed to teach Jeet Kune Do.
It is such an insult. The truth is understood by those who have dedicated themselves to the teachings. Not by self proclaimed martial masters with no real degree, who hand out black belts to their students as fast as a fast food restaurant hand out hamburgers.
Impersonators have created egotistical principles that are placed snugly along side of their own interpretation of the arts without prior knowledge from any of them. Adding nothing more than offensive strategies that depend on brute force, instead of teaching defense from offensive attacks calling it self discipline.
Unknown to the student, they are being used in a carefully designed advertising web to attract more students. (more money) Devising carefully designed choreographed trickery to impress people at public demonstrations for the sole purpose to be walking talking advertisements.
Impersonators as well, create certificates of authenticity claiming to be masters, some claim to have mastered more styles then they could possibly learn in one life time.
It would be nice if we could substantiate legitimacy. It seems we are loosing our legitimacy among fools.
There is a way you can tell what is false from what is real.
My question to you…
What is just one way, you can spot the deception?

Alright! Let me simplify the question...

Is there a way you can tell?