Not to worry about police. Last one any neighbour would call.
If the micro incall is a rental building, often the other tenants don't care too much and mind their own business.
As well, the building manager often doesn't care, unless there's a lot of noise, because s/he wants to keep the units rented.
If the incall is a unit rented in a strata, then any nosy upset neighbours will report a micro to the property manager.
Then the manager would call the landlord/unit owner, who boots the micro tenant.
I am told in one case that the on-site building manager determined there was a micro operating, and talked with the operator directly.
The unit owner was not notified, but the micro had no choice but to leave, as potential customers would have be harassed.
The customer's risk in micros is next to nil.... the only real one being present during a micro hold-up.
These days not a lot of money is kept on-site at micros, but are picked up regularly during the day. The pickings for thugs are much less attractive.
Massage parlours are safer because of their security cameras, and thieves know the owners will call police afterwards with the video evidence.
Police are not interested in what business activity may be going on (they already know anyway), but in pursuing the hold-up criminal, particularly if he is armed.