It's already happening.
I'll quickly break it down :
Firms quick to play this down.
Hackers spread malware far and wide.
International businesses call for review of open source. Some big names get caught with their pants down using freebuntu when they should be on commercial open source.
Widespread data breaches.
Slowing of the internet.
Some share prices hit.
"Harmless defacement" of websites goes viral and gives us a giggle.
Possibly, and what worries me is some kind of terrorist hacking activity.
Mark my words, the internet will not be the same again and nor will open source. And I think this will be for the greater good.