I'm not posting this to tell on anyone or start trouble, but....
When using other people's photos....PLEASE ask for permission and post a photo credit; it's the right thinng to do 
I recently noticed one of my photos on someone's profile as their "profile photo". I didn't get too upset as he was only 14 I think...but I left him this polite message:
Hello,
Your profile photo is one of my photos, it is posted on my site http://www.boakingdom.com/aztec-okee-f2-2.jpg as well as the "forum photo" for Kingsnake.com's cornsnake forum.
I have no problem with you using it, please post a photo credit below it like Kingsnake.com did... http://forums.kingsnake.com/forum.php?catid=70