Facebook, MySpace Confront Privacy Loophole

The WSJ:

Advertising companies are receiving information that could be used to look up individual profiles, which, depending on the site and the information a user has made public, include such things as a person’s real name, age, hometown and occupation.

Not a good month for Zuckerberg.

[Updated: 5/21/10 at 6:52 AM]

Marshall Kirkpatrick for ReadWriteWeb.com:

Facebook used to, in some cases, send referring URLs with logged-in user IDs inside the URL when a user clicked on an ad. The Journal alerted them to that situation and they now obfuscate those URLs. That’s good. Potential privacy situation dealt with. Unfortunately, this is something that is hard to explain to non-technical readers and in its attempt to do so, I believe the Journal’s coverage left more technical readers confused and concerned that all referring URLs were being criticized unfairly.