Baroness Howe and others in both the House of Commons and the House of Lords are calling for a Select Committee on new media and violence.
During the passage of the law it emerged that only one parliamentarian had taken up the Minister's invitation to visit Charing Cross police station to view examples.
Lord Faulkner (a Labour appointment) said "I was left with the question whether their possession is so threatening to society that it is worth turning people into criminals and sending them to jail".
He concluded "I really cannot imagine that any useful purpose is served by creating criminals out of the people who possess them."