Being noisy and annoying is just the very tip of the development iceberg here.
Can a delivery driver do some of this stuff today and so why haven't they done it yet? Sure. And idk, it'll just take time. The UAV platform is going to be a lot better for this kind of nuisance.
If lawn-care companies wanted to do targeted advertising based on how your lawn is looking, they can already use satellite imagery for that. They don't need drone cameras.
These drones also aren't going to fly by your window. They fly above the height of houses, trees, etc. - and they are too small ads you could see from that height
Delivery drones (which is part of the topic at hand) will absolutely fly by my window, otherwise how will they deliver the packages? Flying above my house still means I see the drones from my window.
Ads? Just beam images down or in the sky. Airplanes do this now during big sporting events and such. Buy a car! So and so are getting married! Etc.
Oh I can see it now. Coordinated drone ads where they'll fly over the sky and let me know it's Black Friday Only at Wal-Mart or I can get the best deal on a new Samsung OLED Smart TV now by scanning the drone QR code with my mobile phone!
Companies have also had, for like a decade now, advertisements in places like malls with cameras to track engagement and how often people look at it and what number of people look at it.
Amazon Fresh also started sending me flyers in the mail after I visited a single time. I get them multiple times a week.