Can't sleep, he's watching

Scientists: No! It’s impossible to shine a light on the moon bright enough to advertise.

….What if we made our own moon and advertise on that?

scientists said this?
- It would take twice the global output of power to overcome the light from the sun.
  
  Relevant xkcd
- Even if it weren't true I would definitely tell the advertisers it was.

We need to invent a device that cancels out the light that comes through a glass window. Like noise canceling headphones but for light

You mean like... curtains?
I don't know how America survives without roller shutters. It's blackout dark in my home whenever I want it to.
- A lot of folks use blinds which are abject shit for keeping out light, blackout curtains are becoming more common but its still not the norm. Also im pretty sure the OOP is in a Hotel meaning thet prolly cant do any modifications, also if you want to go to Vegas assuming you have a car stay in one of the satellite towns, Primm, Boulder, or a KOA campground.
We have those. They're called walls.
Kinda like tinting a window?
- Fun fact, most LED displays will only display a very specific wavelength of light for each primary color, if you can isolate the specific values of red, green, and blue, that the sphere uses in the LEDs in its displays, and get tint/filters for those wavelength ranges, you can effectively "tint" the windows where the sphere would be nearly impossible to see, while almost everything else would be fairly clear.
  
  Almost all other light is broad spectrum, so even a single color item would reflect a much larger range of wavelengths than what the sphere produces, which may make red/green/blue objects less bright through the window, but they will still be observable, while the sphere is basically just black.
- I can guarantee you that there are people researching "variable glass tinting"
It makes more sense to outlaw devices that let you see through walls (windows).

Spunch Bob Sqor Ponts

If you can see the sphere, you paid extra for the room and you knew what you were getting into.

Not really. I stayed at the Venetian last year, and my my room didn't include the sphere view in either the features or as an upcharge. (The sphere is "part of" the Venetian, so they'd be the most likely to advertise rooms with a view.) Their room is quite a bit further than mine was. They may have paid for the strip view, but without specific advertising they probably would not be able to tell ahead of time if they'd have LOS on the sphere.