Food art has become a "thing" Glitch and I think this is the sort of emergent community behavior that Tiny Speck is hoping for. How about adding some in-game support in the form of a feature for "art installations"?
A player would place a bunch of food artistically and then set up a "plaque" with a title or any other inscription. No players would be able to take the items once the plaque was set up (not even the artist), and the installation disappears after a time.
If passersby liked the installation, they could give it a thumbs up, and conversely they could give bad art a thumbs down. If more people keep appreciating the art than dislike it, the lifetime is extended (possibly indefinitely).