Remember, RE people don't think that the First Amendment gives you the right to say anything that might depress property values. (Writing puff pieces extolling RE is perfectly proper, of course.)
There was also a great rant at that thread at RCG from a RE agent complaining about Zillow's house price estimates:
"Property is not the same as a stock, book, or car. These are people's homes, businesses, and dreams for the future. The fact you chose to attack those basic principles of the American Way of Life for a few dirty dollars is reprehensible.
Gordon [i.e. Zillow], you are free to pursue your dreams also. That freedom ends when it damages others. I see today you are not above doing damage."
On the other hand, in a different thread, you can see why Ardell might be a little bit touchy:
"I love my house. It is one of the joys of my life. The value could go down and I've considered that, since I haven't owned it long, and bought it in truly peak market times. "
Wow - not only does she work in RE, but she bought a house at the peak of the market. Good luck with that...