Looked in my photo stats and I had a referral from: amerikalife.ru/ As far as I can tell they are taking them from this group, just as an FYI. I don't care, and I don't know if anyone else would, but thought I'd post.
I wouldn't say they're "taking" from this group. They have an automatic feature that displays the newest photographs from this group. They're not claiming the photos are their own. By putting your photos on Flickr, unless you specifically state otherwise, you're allowing them to be used in the way this other site has used them.