I just thought about this today for some reason, in the Matrix when Keanu sees deja vu and "they changed something"... The plot hole is the change. Why did they wall up the place? Wouldn't it have made more sense for the Matrix to just obliterate the building, perhaps changing it by parking a Nuclear Warhead there, or a massive collapse and inferno of the whole structure? Woulda taken care of everyone without any coppers having to do crap.