Why do people go to such great lengths, and risk such great financial calamity, to try and subvert the planning system?
The news has been full of stories recently - here's the latest example - of self-builders who seem to hit upon the bright idea of not bothering to get planning permission, build a new house anyway, and figure that 'hiding' the whole thing, usually behind straw bales or basic tarpaulin, is the most sensible course of events.