How do we put an end to the spread of ninjas in our society?

HighlyVolatile
There are a lot of hidden ninjas out there. The obesity epidemic has mitigated this but there are a lot of skinny people left around us and any one of them could be ninjas. Actually, I read some papers and concluded that as many as 75% of skinny people could be ninjas.

It's even possible that I am a ninja without knowing it but I don't know martial arts. At least I don't think I know martial arts that well besides kickboxing, boxing, and a little bit of judo. I also wear a face mask.

I might even be contagious if I am a ninja without knowing it. I wear boxer briefs and sweat pants before hanging off trees and doing somersaults just like any normal person. Yet I feel a ninja inside of me and I don't want to spread the ninja to other people.
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I can't help but watch the ninja movies like this. I tell myself I shouldn't watch it but sometimes I become weak and I watch the ninja movie:
https://youtu.be/n4j6dQS95fo
Then I feel my ninja coming up so hard and I tell everyone, "Get away now! My ninja is acting up!" But it's too late.
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As one I suspect might be infected with... with this... disease... of... with... as I... not ninja... cough-cough... as I... shuriken ninja power! ... no... I mean... as I ninja jump-double-kick! noooo... what I mean... what I mean if you know what I mean... what I mean is that... you must... you... you... you... you must... must... not be ninjas! You... must... be slow... be... heavy... be... be...
How do we put an end to the spread of ninjas in our society?
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