I'm thinking that drones would be a more obvious solution, as they can knock on windows even in high-rises. Maybe even with bright lights for deaf customers?
Also do not forget the challenges! Being already awake before the drone arrives for 30 consecutive days also grants an (entry-tier) microtransaction (available once per household, requires the same person to be awake every day), better ones are available for up to 730 consecutive days to give you a feeling of pride and accomplishment!
Peak times -- i.e. 6am -- will, naturally, be priced hire to account for demand.
We'll beta test a "troll your neighbor" option for a 10x rate, but we'll let you wake up anyone within 300m of your location.