This one was the source of controversy several months ago.
It seems an individual with an unnamed telecommunications giant was browsing my Flickr site, looking for Winnipeg photos to use in their marketing materials. Thinking that Flickr was a free stock photo site, the individual plucked the photo and used in without permission.
It was brought to my attention, so I contacted the individual responsible for the photo theft. The situation was dealt with in a satisfactory way, but it did open my eyes to the danger of posting images on Flickr, or anywhere on the Internet for that matter.