I haven't heard of them, but upon looking just now, I see a few stolen photos, a lot of "cosplayer photos" which are usually stolen, but are hard to tell, and a lot of photos that look like they could be stolen because of how they are. They look very similar to other photos if not the same. It's really up to you, but they look pretty sketchy to me..
Cosplay DA Regular DA
-Fate Testarossa (Mahou Shojo Lyrical Nanoha A's) ~90%-
-Ryouko Ookami (Ookami san and her 7 companions) ~75%
-Amy Sorel (Soul Calibur) 25%-