Time after time it's been proven that the safest security is the security that is shrouded in the most mystery. Why can't anyone hack Windows 7? Because it's new and no one knows how it works. People like Ormandy are a bane to the community because they steal code from Microsoft (there is no other way they could know about these flaws) and then once they stolen it, they release it for virus writers to hurt the common man. They are a public enemy and I'd suspect he has contacts inside Microsoft (if you're reading this Steve Ballmer, I suggest you begin purging those who doubt you and those closest to you).
I cannot believe Google would show support to someone who is most obviously a criminal aiding and abetting other criminals.
Nobody wants their source code shown to malware writers for obvious reasons so let Microsoft have its privacy. Why do individuals get privacy rights but not Microsoft? Did you ever stop to think about that? No, you didn't, because you were too busy helping the bad guys.
You should never reveal a security flaw. It's called common sense about saftey and protecting everyone around you.