Lambadelta
Mad Scientist
What difference would it be in people visiting the site as a memorial as opposed to people coming and going from work when the company was there? I would think a memorial would be much less disruptive to the neighborhood than the actual business was, especially considering the previous traffic and parking for 70 employees and business visitors all day long. And whether or not they put a memorial there, the site is still going to be visited by a lot of people, so they may as well make proper accommodations for them.
They're probably worried that it will become a place where large numbers of foreigners come.