Even if it isn't 'scripted', there's an implied script in the objects laid on the table and the general presentation as a piece of interactive art where the audience is requested to participate by doing 'anything' to her and she won't react. They were being asked, implicitly, to break norms, to treat her as non-human, to get all weird in the name of Art.
The idea that this says something profound about how people will 'naturally gravitate' towards violent or dehumanising behaviour is ridiculous.