Turn on showdead in your profile and you can see what is being killed.
But even that isn't the whole picture - for example this thread has over 100 points and has magically disappeared from the front page in only a few hours while topics with far fewer points stick around. So there must be an invisible gravity switch.
But even that isn't the whole picture - for example this thread has over 100 points and has magically disappeared from the front page in only a few hours while topics with far fewer points stick around. So there must be an invisible gravity switch.