Another member of Dysamoria.com found, via the wonderful Google Cache, the previous version of the WordPress Abuse page. The wording used to be:
"In addition to spam and copyright issues, we will suspend blogs or blog posts for the following types of abuse:
- Personal threats and revealing of personal information
- Calls to violence
- Impersonation of a private person
- Accusations that can be proven wrong (for example wrongfully calling someone a convicted felon)"
Excised about two weeks ago is the last bullet point: "Accusations that can be proven wrong (for example wrongfully calling someone a convicted felon)."
The Google Cache was recorded March 6th 2010, leading us to believe that this specific event (the hate-blog & related complaints) is indeed what lead them to make the changes we've shown you.