Earlier this year, a young teenage boy in America emailed me via my
website to tell me that I'd stolen from him an item on my "FTP
Warehouse" page. He was writing, apparently, because he thought I
might like to know about the person from whom I'd stolen it.

Of course, he might have downloaded the file and observed that it
shared little with his own (which I'd never heard of) apart from the
filename. In fact I suggested he do this, although I had to reply
twice because the first time he wrote back to tell me that his
father had deleted my email assuming it to be a virus.

Sometimes, at least, cluelessness must be inherited.

Adrian.