A nice one from the Economist - an honest flight safety announcement. It'll never catch on:
"Please switch off all mobile phones, since they can interfere with the aircraft's navigation systems. At least, that's what you've always been told. The real reason to switch them off is because they interfere with mobile networks on the ground, but somehow that doesn't sound quite so good. On most flights a few mobile phones are left on by mistake, so if they were really dangerous we would not allow them on board at all, if you think about it. We will have to come clean about this next year, when we introduce in-flight calling across the Veritas fleet. At that point the prospect of taking a cut of the sky-high calling charges will miraculously cause our safety concerns about mobile phones to evaporate."
[via them lovely people at inky circus]