<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=0j74jcxSunY" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=0j74jcxSunY</a> is a very well done talk on why this is a bigger and much harder issue than it appears on the surface.