I remember when I was in college our photography facilities were like this, where you pretty much had to trust others not to be jerks and steal your prints. Thankfully no one ever did.
I did however paint a really beautiful painting one time and it was the best one I had ever done. I am a rather forgetful person at times and accidentally left it on top of my locker at school when I was cleaning it out. As soon as I remembered, I ran back to get it and it was already gone. I can only hope someone stole it and kept it and hung it up somewhere, because just thinking that a janitor just threw it out with the garbage makes my stomach hurt I didn't even get a chance to take a picture of it or show it to anyone as my professor had just given it back to me. It's amazing how I am still sad about that painting
I feel for ya! I'm glad the model wasn't very angry with you. And Craig is right, Karma or something like that will get that person back.