The camera never lies ... until now, that is ... HP has a line of cameras that incorporates a 'slimming' feature:

They say cameras add ten pounds, but HP digital cameras can help reverse that effect. The slimming feature, available on select HP digital camera models, is a subtle effect that can instantly trim off pounds from the subjects in your photos! [Slimming photos with HP digital cameras - HP Digital Photography Center]

I saw this a while ago and thought it must be a joke. As if it wasn't difficult enough thinking about the 'documentary record' already ...