If he would have been holding on to his "Oh SHIT!" handle, this wouldn't have happened. He was obviously too into the conversation to realize he was in a dangerous situation.
Stuxnet is actually fairly simple. ;) I'd imagine that it would probably be spread with porno and other sinful propaganda. Probably hidden in a Unicode character set. It then would reprogram a Logic Board and commence it's mission, which is to destroy idiots like you.
If he would have been holding on to his "Oh SHIT!" handle, this wouldn't have happened. He was obviously too into the conversation to realize he was in a dangerous situation.