There’s another scam targeting World of Warcraft players. It starts with an email claiming that the recipient’s World of Warcraft account has been suspended. There’s a long explanation and a link to a website.
The website asks for a username and password. It then passes on the username and password to whoever wrote the email, it’s not a legitimate service.
This is called phishing. It works by tricking people into typing in their credentials onto a fake site.
These days good anti-virus packages can filter for these sites. You should also pay careful attention to the web page address. Read this explanation on how to identify false addresses (URLs).