Back to Deaths in Homes

I was interested as to whether people should put signs on doors telling someone not to enter if there was a death in a room.  This would appear to be a red light to me if I were a buyer.  Sholuld we tell buyers immediately what this means?  I had a room in one home with a sign on it that read "only the Broker could enter this room"  it seemed to cause more interest than anything else in the house.  I told the people that it was there because of personal items stored.  But, what if I did not know why they put the sign up?