A picture of Francois Hollande looking less than statesmanlike caused a stir today, after picture agencies were accused of pulling the gormless image in a bout of self-censorship . Anyone would think Hollande was the first politician to be caught on camera looking daft. In fact, whether it's Geert Wilders seemingly picking his nose with a ballpoint pen or George Bush being upstaged by a turkey, there are plenty of other mortifying examples to enjoy. John Crace imagines what they were thinking