From the INQ:

AUSSIE SECURITY experts claim that Second Life and online games such as World of Warcraft are being used to train terrorists.
According to the Australian newspaper a terror campaign has been waged in Second Life which has left a trail of virtual dead and injured, and caused hundreds of thousands of dollars' damage.

Apparently there are three jihadi terrorists registered and two elite jihadist terrorist groups in Second Life and they use the site for recruiting and training. This is on top of the Second Life Liberation Army, which has been responsible for some computer-coded atomic bombings of stores on the site.

Rohan Gunaratna, author of Inside al-Qa'ida, said terrorists are rehearsing their operations in Second Life because they can't practice in the real world.

Kevin Zuccato, head of the Australian High Tech Crime Centre in Canberra, says terrorists can gain training in games such as World of Warcraft in a simulated environment, using weapons that are identical to real-world armaments.

So we can expect more terrorist attacks involving broadswords and Heathrow airport to be closed due to suicide dragons.