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.