An observation only, but I would agree – if the Body Corporate has done everything in their power to comply with the legislative requirements, it would be a stretch to hold them liable for something they didn’t do – which is to wilfully remove the lock. If the BC was to be sued for an injury caused by the removal of a window lock, I imagine they would join the individual who removed the lock to the proceedings and shift the blame.
I do find Managing Agents often have a loose grasp on reality in such matters. It was recently suggested to our BC that we remedy (ie pay to fix) a situation caused by a 3rd party, before the Managing Agent had even contacted the 3rd party to give them to opportunity to remedy their error. Shheeesh.