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[This note caused great offence to someone who castigated me in an anonymous comment posted nine months later. I did not allow it to appear since I wanted to reply to it in detail, which I did in October].
Michael Frayn
[*The website linked here has a great deal of data about the countries where spam and viruses originate. It seems that the UK is relatively innocent in this respect, though it looks on their map as if there might be a bit of spam-producing wickedness going on in the Brighton area, which would surprise no-one. However, some sources of spam cannot be traced, so it is quite possible that there is a vast organisation based in, say, Bourton-on-the-Water, churning out spam and cunningly concealing its location.]