There's no way for that to happen unless you accidentally hit the "report" or "send this topic" links. The quote link is just an ajax script that copies the post and puts in into the quick reply box with quote tags (unless you have quick reply disabled or minimized of course, then it opens a full reply page).
Yet this has happened to me numerous times. Quote and report to moderator/send this topic are no where near each other. Besides, I have no need or use for reporting a post or sending a topic. Also, if this had been once or twice I would buy into the theory but this has happened to me a dozen times at least.
No, it looks just like the deleted post in the recycle bin.
Wait, you three have access to a recycle bin?