Free mount trial EMAIL hijack

Thought I should post this -- I saw others warning/reporting of an 'unknown' whisper in-game. I actually got an email in game from "unknown" listing the now infamous url related to battlepost but misspelled. I didn't even notice it was from unknown before I went to the site and signed in. However the web form immediately asked for my secret question info and I realized this was a fraud. I immediately changed my password on battlenet -- you guys need to watch out for this one!!!
You would think Blizzard should be able to prevent whatever in-game mail hack is going on here. I did report it as spam so hopefuly they have the info necessary to stop this.