Ah. No, the server does not take into account whether a scenery object has been placed between a character and an NPC when testing for line of sight and aggro. It uses a precompiled map file containing the solid geometry specifications for a zone for that.
Though, it's possible someone more knowledgeable about the map files could chime in on whether you could re-run the mapping program in such a way as to add objects from the `doors` and `objects` tables to the map file for the server's precomputed checks.
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