Next week the latest in a long line of parasitic chancers who have ruled Britain and (up to 90 years ago) all of Ireland for centuries will descend on the city of Dublin. As a result some one million people are going to have their lives seriously disrupted and tens of thousands have already had to suffer intrusive Garda calls at their homes. Streets all over the city will be closed, Garda will be harassing pedestrians and motorists, even the zoo will shut. And all for what? That is a question that seems impossible to answer.