Then this story about viruses at a nuclear power plant won't make you feel any better:
http://www.reuters.com/article/us-nuclearpower-cyber-germany...Some great quotes:
"Mikko Hypponen, chief research officer for Finland-based F-Secure, said that infections of critical infrastructure were surprisingly common"
"Hypponen said he had recently spoken to a European aircraft maker that said it cleans the cockpits of its planes every week of malware designed for Android phones. The malware spread to the planes only because factory employees were charging their phones with the USB port in the cockpit."
