The Register quotes Jack Straw as saying
We knew that terrorists were going to use this
Here's the full quote:
Will you make cars illegal because you know terrorists will drive cars?In September 2001, shortly after his stint as Home Secretary, when he had introduced RIPA, Jack Straw took to the airwaves to defend the powers."It was government trying to put in place increased powers so that we could preserve and sustain our democracy against this new kind of threat," he said in a Radio 4 interview."We needed to take powers so that we could de-encrypt commercially encrypted e-mails and other communications. Why? Because we knew that terrorists were going to use this."