A grocery store in the Czech Republic found the perfect family to promote its local delivery service. They were young, attractive, and the children had infectious smiles.A virtual Facebook friend saw the "life-size ad", took a photo of it, and sent it to the blogger. The article goes on to say that if this happened in the US, laws are such the response would be easy. You would just need to go to the company and say "show me the money." Things get a little more complicated with foreign countries.
But the family had been plucked from a photo in cyberspace, and the stars had no idea they were endorsing a foreign grocer in an advertisement thousands of miles away. [Link]
This is something to consider by anyone who posts family photos on the web. The blogger "says she has learned an important lesson about posting pictures online: Always use low-resolution images (so they don't look so good when enlarged) or stick a digital watermark on the photo."