Over at the Big Hollywood site – one of many started by the late Andrew Breitbart – it points to how the singer Lady Gaga (full confession – I have some of her tunes on my iPod) pulled out of a tour in Indonesia, a country with a big Muslim population, on the grounds that her material would offend some of the locals. She has cancelled the tour, although she has made rather mealy-mouthed comments on it. Now just imagine what typically happens if, say, a Christian organisation complains about the tone and content of a singer’s material? I remember back in the 1980s when Madonna’s lyrics and videos incurred the wrath of some. And yet such singers regard it as almost a badge of honour to offend Christians. But with Islam, or certain varieties of said, somehow that delight in causing offence does not exist. And we know why: because those who cause such offence, such as Theo van Gogh can reach a very sticky end. As some of our more colourful music entertainers are finding out, there are limits on your willingness to test freedom of expression in the face of potential violence.