I do realise; however, I'm not suggesting some foolproof plan for deceiving customs agents. The poster, Marc Jacobs, simply mentioned that the agents accepted the date stamps on his shots as evidence of purchasing his camera in the UK.
They certainly could have checked serial numbers, EXIF data, etc., but, from the post, it was my understanding that they did not. Sincerest apologies if I did misread the post, but I was just noting how this bit of accepted evidence, as I understood it, could be manipulated.
Further apologies from me for drawing the thread off course; I've found it an interesting read and do not wish to detract from it any further.