I've had numerous PMs saying 'I think you may have the wrong person, I've never attached anything!'
True, you may have not attached anything, but I sent that message to everyone, and added it the rules, because it was more likely to be seen by everyone that way. If it seemed like a personal attack on you, I'm sorry, it was not intended that way, merely as a general announcement.
People have also suggested that I disable attachments - I did think of that, but it stops other files being attached, so I didn't.
