'To sneer at such events," cautioned The Sunday Telegraph apropos Live8, "demeans the generosity which they embody". Oh, dear. If you can't sneer at rock stars in the Telegraph, where can you? None the less, if not exactly a full-blown sneer, I did feel a faint early Sir Cliff-like curl of the lip coming on during the opening moments of Saturday's festivities, when Sir Paul McCartney stepped onstage. Not because Sir Paul was any better or worse than Sir Elton or Sir Bob or any other member of the aristorockracy, but because it reminded me of why I'm sceptical about...