> Of course, if virtual reality is real enough to treat the disorder, could it still cause it? Rizzo doesn't think so. "I think that somebody would have to be psychologically compromised to begin with to mistake the events that go on in the virtual world for real events," he explains.

Rizzo thinks you can't because it doesn't seem real, not because there's no actual danger. Make it seem real enough, and their point doesn't stand anymore.