No. The only thing that this key can do is signing an alert message that propagates through the network.
Learn to read. It's about a line of text, an informational message, and only affects the reference Bitcoin-Qt implementation (most Bitcoin users are using different wallets for their routine needs)
The worst that the FBI can do if they waterboarded Gavin to get the key is speading FUD to Bitcoin-Qt like "All Your Coinz Are Belong To Us!"
It also can be used for sending the upgrading message. Remember the last bitcoin issue(Hard fork)? Did you read the source code before your upgrading?
I just want to say, if you trust Bitcoin, you need to trust the core developers. I did not say they are not trusted.
I dont know why i even bother with idiot like you ....
Thats not a "key". Go learn what that actually is from reading the source code.
What you said has nothing to do with Gavin or core developers having a "key". If you use a client for your wallet that means you trust the coder of such client. Any core developers can release their version of wallet client. Why does this "key" anything to do with that?
Beside do you know how github works? You cant release a new client with illicit code without being noticed easily.
My conclusion, you're just too dumb and trying to make sense of something you have no fcking clue about. I'm kinda glad you lost money in Gox because it will(hopefully

) be a valuable lesson for you.
PS: wow lucky for you, i can read Chinese..... You're such a clueless shit that doesnt deserve to get rich from bitcoin boom. First you came here not understanding bitcoin technology, 3 years later you still dont understand crap..... you even said next gen of ASIC is BSIC and CSIC.... wtf? LOL