The BBC warns that your XMas photos posted on the Internet might end up in the hands of marketing, and then you can only imagine what will happen

“It’s a life-size picture in a grocery store window in Prague – my Christmas card photo!” said a startled Ms Smith, 36, who lives in a suburb of St Louis.

Mario Bertuccio, whose Grazie shop specialises in Italian food imports, said that he thought the image had been computer-generated.

Well, it was computer-generated. Does that change anything? The family says they are not taking any chances with new images.

They said they would add a watermark to any family photos they post in the future.

Will the shop still use it with a watermark? Perhaps they could also reduce the quality so it is less likely to be useful for window-sized posters in grocery stores.