According to the British Journal of Photography, hundreds of images - some taken from Flickr - were used on a microsite used to promote a Heinken-sponsored Irish music festival. The offending images were removed after several of the copyright owners objected, but in a spectacular display of chutzpah (or bare-faced cheek, depending on whose side you're on), Heineken insists that they will only pay a maximum of EUR15 per image - and that only after the photographer has proved both that a copyright infringement took place, and that they are the rightful copyright owner.
Heineken's behaviour in this matter is unethical... but it's probably legal. Yep, the law's an ass when it comes to copyright (and likely to get worse).
The lesson? Don't display your best pictures on the web without a hefty watermark across the middle. It's the only thing - the ONLY thing - that is likely to prevent your copyright being infringed. And if the infringer in question is a big corporation who can afford expensive lawyers, you're unlikely to get much of the way in compensation... if at all.