Today, one of our members posted a photo not owned by him to the POTW contest, and has been suspended from Wetpixel
Please do not post someone else's photo as your own.
* The reasoning -- both times --was that the image "ended up" in his collection, and he thought that it was his. Personally, I can't imagine not having any confusion about whether you had taken a given image, but I suppose it is in the realm of possibility. In this case, the image was so striking that such an excuse was really stretching the boundaries of credibility, but we let it pass because we were unable to prove otherwise. We had no reason to let an excuse like that pass again.