It shouldn't be forgotten that what keeps ATM ideas afloat (apart from deliberate bumping by the ATM presenter) is participation from members. If members so wished it, any topic could disappear from the screen in a matter of days. One thread I remember had giant earth worms and goodness knows what else as its theme, written in almost unintelligible English. This went on for week after week, but the only thing that kept it there was member participation.