"...whose presence is not conducive to the public good."

Hazel Blears promises to send foreign evil-doers back to where they came from.
Honesty compels me to put myself forward for deportation. Ever since I started studying philosophy, trying to think, my presence in Britain has become less and less conducive to the public good. In fact, the more time I spend reading, the more convinced I am that all my efforts must be directed against what is called the public good.
This reminds of a funny bit of Fahrenheit 9/11, when the peaceful middle-aged pacifist recounts with quiet puzzlement how he was accosted by the FBI. His crime: the dissemination of 'dangerous' ideas.