Doesn’t sound very good advice to me – unless the officers of the Owners Corporation wanted to end up before a magistrate.
In NSW it is illegal to take photographs of private property without the owner’s permission. It amounts to trespass. I encountered the situation when I had to take photographs of a garden that was common property, but within an owner’s lot. Police warned me to be careful not to frame the photo to include any of the owner’s property.
I believe the same thing would apply in other states, and using a drone to look in on an owner’s property would be a) illegal and subject to penalty if the owner complained; and b) inadmissible as evidence in the case about the garden in question – because it was obtained illegally.