Sketch: David Cameron wages war on the straw men Who these people are, it's hard to be sure (for some reason, Mr Cameron never identifies them, and never specifies where and when they've said what he says they say). Still, at any rate, they do a terrific job of making Mr Cameron's views sound supremely reasonable and wise in comparison. Turn our backs on the world? Ignore these leaner, fitter countries breathing down our neck? Not Mr Cameron! You won't catch him being so foolish! Or: "There are those who say, "Children make a tasty and nutritious snack." I disagree. I say, "For heaven's sake, let's not eat our children! Let's have a healthy packet of nuts instead, or a nice juicy apple."" The Prime Minister was doing battle with his imaginary foes at the building site of a new port on the Thames. The port is being built by a Middle Eastern company called Dubai Ports World. Mr Cameron was introduced by the company's chairman, a sultan who for some reason on this cold and dreary morning was wearing sunglasses. After urging his imaginary foes not to turn their backs on the world, Mr Cameron scolded some different imaginary foes for thinking immigration should be a big cheery free-for-all. "We're familiar," he said sternly, "with their frankly patronising attitude to those who disagree." No one with concerns about immigration, he went on, should be dismissed as a "Little Englander." Or, presumably, a fruitcake, loony and closet racist. More mysterious was his warning about yet another horde of imaginary foes who will apparently try to tempt us with something called "the comfort blanket of British destiny." Unfortunately he didn't explain what the comfort blanket of British destiny is, but I shall be sure to decline it if offered, along with the hot water bottle of glory and the slippers of fortune. Journalists all wanted to ask about the online spying story; after giving vague answers to two questions about it, he hastily moved on to other topics ("Any questions from the audience, now we've dealt with the press?"). Still, if any journalists were disappointed that they didn't get to ask him more about snooping, they can always save their questions in a draft email and he'll read them later.