My general advice (and I've given this to more than one poster):
If one is sharing a sensitve photo, never put it on a photobucket-type site, or if you do, put multiple copies on the site, direct EACH person you give it to to a different copy.
The only difference in the copies should be a very small, non-contrasting number in some unobtrusive place. Then you know who has which image. It helps in tracability if it ever ends up being re-posted, and because the number is actually in the image, re-naming the file doesn't remove your tracability.
There are probably other, more subtle ways too.
I really do think this was a horrible thing to do.
-SB