Uh, this is a convoluted approach to a pretty simply established relationship between public and business owners / operators.
Practically speaking in my city, based on ordinances, if there's no sign that says "Post No Bills" then "It is okay to post flyers on this building." The flyers should be different from vandalism, in that they are not permanent nor so flimsy as to fall off and become litter. A projection easily fits into this category, physical or digital "bill" so to speak.
That sounds like a horrible relationship, and is certainly not the norm in many cities.
As a property owner, you should not have to request (by means of a "Post No Bills" message or other) that other people don't interfere with your property.
If it's not causing damage or vandalism then I don't quite see the issue. If the material is unwelcome then of course the property owner has every right to take it down. Mostly this ordinance is useful for closed / boarded up buildings, in my recollection.
Practically speaking in my city, based on ordinances, if there's no sign that says "Post No Bills" then "It is okay to post flyers on this building." The flyers should be different from vandalism, in that they are not permanent nor so flimsy as to fall off and become litter. A projection easily fits into this category, physical or digital "bill" so to speak.