They just dont know that.
You need editor's rights. Anyone can sign up and get them and see what (and more importantly, WHO) has gone in and changed things on Wikipedia. You can also cut and past old versions of what was up and then disseminate within the blogosphere. And, at the end of the day, you can also have fun and just restore the conversial word/text to Wikipedia, and keep restoring after they keep deleting until they get tired of this.
In fact, that reminds me. It seems VAN JONES' page on Wikipedia is in dire need of an, er, uh, "update?", shall we say.....
the TIDES foundation? Isn’t that associated with Barbara
Streisand?