1. It is unnecessary to display a non-smoking sign. Everyone knows about the law and we don't need nagging.
2. The signs originally distributed for display are becoming old and tatty. In many cases the signs are incongruent – e.g. on listed buildings, etc. We should get rid of these eyesores.
3. It is psychologically perverse to keep displaying pictures of cigarette (even with red lines through them) when we should be encouraging people to forget about smoking, rather than constantly reminding them of cigarettes.