And here we thought no one can see our deleted posts!
It is against forum rules to delete posts (Rule 18).
Interestingly, I recently posted an airline deal, but then I found that there was a post for it on DDMS dating back a month before, so I deleted my thread. (I hadn't been aware of the rule at the time.) Apparently, the DDMS post had been long dead, because my deleted thread was undeleted (by a moderator) and a new DDMS post was made with the deal, with a h/t to me.