The National Association of Realtors is right about this
I gave a speech at the PCBC builders conference earlier this week which Glenn Roberts, Jr. summarizes on the Inman News blog. (The link is to a subscription site, unfortunately. I could get to the article yesterday, but today it asks for a login.)
In his article I am quoted as saying that the N.A.R. lawyers threatened to sue me. The N.A.R. correctly denies these allegations. It was the Multiple Listing Service of Northern Illinois that was threatening legal action. I may have said the wrong thing in my talk (although I don’t think so). If that is the case, I apologize for the mistake.