Joe –

Spam in the wiki on Zillow has been a challenge but it’s one w eare addressing. Here’s what we’re doing about it:
1) We removed attribution of the most recent editor and most recently created articles. Both features were creating a strong incentive for spam. Now, as you know, you have criticized this change but we have seen a dramatic decrease in spam submissions since it went in and it was clearly the right thing to do.
2) Content flags are our primary mechanism for identifying spam. When wiki spam is flagged it’s removed by site moderators. We have just increased moderation coverage to 7 days a week so you should also notice an improvement to the immediacy with which we react to flags.

Without, again, any systematic sampling, I’d conclude that Zillow is not making a very credible effort to clean up the spam. I’ve gone in and reverted some egregious garbage to earlier versions of the page, seen the spammer revert them back, and seen Zillow appear to be oblivious to the process.

Even entries that have been flagged have gone uncorrected for extended periods of time, if at all.

Zillow doesn’t seem to ban any of the offenders from the site. The kind of people who engage in spam have downside. At worst, it seems, their spam sits uncorrected for 6 weeks, is overridden for a day or two, the sits uncorrected again for 6 weeks, if it’s even corrected at all.