The chat has come across a case where one user does something similar to Ira. From the few of his recent answers I looked at, it seems he hasn't done it as badly as Ira Baxter did. But then he goes out and actively searches old questions (new ones, too) and plugs his products.
Yes, he adds a disclaimer, but still, I object. This site is such an immensely useful resource because so many programmers devoted so much of their valuable time and energy to giving away their knowledge for free. That's what made SO the success it is. Now people like Ira or this guy come along and ride on the back of that to advertise their commercial products. As I wrote elsewhere:
If only 10% of us did the same, the site's usefulness would drop very quickly.