We dont totally remove posts as its a legalilty thing with Moderators.Once "physically" removed you cannot view it as its totally removed from the database. We need this info for investigating users etc.
I realise that its not relevant to the spam lounge (which is full of useless crap) but its a option that has to apply to all posts in the forum.
So as it stands you will have to look at little lines of "dont post spam/dont hijack" etc in the spam lounge.