Have you ever had a job before? They have OH&S practices that cover things like that. It's someone's job. Or a whole department. It costs money.
I once got in trouble with the OH&S guys at my old workplace for having my jacket over the back of my chair. They said I could move the chair back, catch the edge of the jacket, fall over and hurt myself. Lawsuit. They were employed to ensure that kind of thing didn't happen so I was supposed to put my coat on a coat rack in a closet so nobody could trip on it. I couldn't believe my fucking ears. The coat wasn't even long enough to get caught like that. Ridiculous.
So yeah, grapes on the floor absolutely motherfucking would be the business of OH&S, and I bet Coles' OH&S guys are making a huge drama over this. That costs the business serious money, and they employ them to minimise their exposure to this kind of lawsuit, because those lawsuits can cost them a lot more.