I suspect that's exactly what the NSA looks for in the billions of messages sent every hour. Encryption tags probably cause the message to be directed to queues for brute force decryption and examination. If you're a bad guy, encryption is probably the worst thing you can do.
ROFL. Brute force doesn't get you anywhere.
See http://senderek.de/security/secret-key.protection.html
But the point of this vote would be to ensure that anyone who used this security was a criminal just for doing so, whether or not they were hiding anything criminal. Or, as the page says about this very legislation:
The British Government has pushed the Regulations of Investigative Powers Act (RIPA) through legislation which provides for orders to disclose private encryption keys and threatens everyone served with those orders with two or even five years of jail who fails to comply with the demands. While some are still figuring out how far the powers provided by this act will reach - - - - the conditions under which orders may be served or surveilance devices can be installed seem pretty much stretchable - others begin to protest while other EU governments seem to show the political will to adopt this famous legislation. The unequivocal obligation to reveal your private communication by law is an effective method to tempt the uninformed public into not using cryptography to protect their privacy and to criminalize those who do.
(boldface mine)
Similarly, over here FBI can now get no-notification warrants to tap your keyboard; all the fancy crypto means nothing if you hand over your keys without knowing it. But that at least requires a warrant, which means they're not simply sitting back watching everyone at once but forced to identify wrongdoers first and then proving it (and best wishes to FBI, too, when they stick to this normal approach).