If I think of the right thread, your picture thread didn't contain any pictures from you to start it, so it was a request thread (a thread requesting pics of a certain kind/theme) by its nature. So I guess it got deleted because of that.
(Edit: I don't want to accuse you with ↑, but just tell you why. (if it's the right thread I think about))
That mods don't tell people when or why something gets removed is a problem that's already ages old, so don't worry, you're not the only one annoyed by that.
About the GA-pics it just might be that not a lot of people have them. Since I'm nice (at least these days) I will try to look through my pics (not very sorted...), but that will take a while, so I wanted to reply when I'm ready for it with pics (also, expecting to get rare stuff handed out nicely after just 15 hours is a bit impatient, isn't it?).
I will also have to look through them if there might be anything against the rules in them before.
But did you get the ones you can find with the search feature already?
(Another edit: I found one that was still on my HD and not on backup devices, so stick with this one for now. She surely does.)