How do 'these lines' prevent such procedures on the part of anyone intent on performing them? So long as one's name is crossed out on the list as having already voted, I see no necessity for further precaution; nor do I see how recording the ballot paper # alongside the voter's crossed-out name makes any difference whatever. I continue to consider it a piece of otiose bureaucracy that flies in the face of one of the privileged freedoms one is notionally guaranteed.