You could though limit the amount of ariel work in a particular sector.
From an aviation safety perspective that would be a good idea - although hard to implement since this is class G airspace. But it would never work from a marketing perspective.
The elections are this Wednesday, and last weekend we had glorious days with the beaches packed. Towing banners along the beach would get maximum attention and (if you believe the marketing guys) maximum votes to the parties involved.
There were also several banner towing flights over Rotterdam, because of the Havendagen (Harbour Days), which attracted 1000s of people. Rotterdam however lies in the EHRD CTR (class C) so Rotterdam Tower was able to provide traffic information to those.