Artificial Salary negotiation limits

I had been thinking about the new trend of posted salary ranges in job ads.The big ranges were making me both laugh and cringe. "Thus job could pay between $1 and $1m"

But reading this article made me think of a different perspective on this. The ranges are limiting negotiation on the upper range and discouraging some people to apply. 

The point of the article - Advertised salary ranges are not set in stone. That's why you still have to negotiate. 

Know your worth and be willing to walk.