Observation is useful, enforcement is not the contractor's role
The information a cleaning crew accumulates about how a building is used is genuinely valuable to an owners corporation, because nobody else covers the property as often. What creates problems is the step from observing to acting. A contractor who raises a matter with an occupant is exercising an authority they do not have, in a relationship where they have no standing, and it rarely ends well for anybody.
The clean position is that observations go to the nominated contact and stop there. The owners corporation or its agent decides whether the matter is worth raising, on what basis and by whom. That is not passivity; it is what keeps the contractor able to work in the building and keeps the scheme's own processes intact. It also preserves the contractor's ability to keep working in the building afterwards.
