Well, I'm grateful to Mark Isherwood and the person who has contacted him. I think all ideas are welcome, and need to be considered on their merits. I'm sure we would want to take advice on that particular idea, for example from police services, as to whether they would regard it as advisable to have a sign in your window that says, 'Old, vulnerable and alone'.

I know that isn't the intention of the notice at all, but you can see how it could be read by others with less benign intentions than the person who made the suggestion. So, I'm very grateful for the suggestion. I think it's great that people use their experience and their expertise to put ideas to us. We would need to test them with others to make sure that there weren't unintended downsides to the ideas that might make them less advisable than they first appeared.