A Moderator removes it from the forum and/or thread in which it was posted and puts it in the recycle bin.
If there is a specific post you are asking about, you need to PM the Moderator that may have removed it. The only ones I see of yours that were recycled recently were not removed by me.
In the future, please post questions like this in Suggestions & Feedback and save the General Skydiving Forum for your skydiving-related discussions.
... wondering where the latest Shayna thread went... huh?
There was the outside chance that someone might have been deriving some enjoyment from it, so it was promptly deleted as per standard dropzone.com policy.