The man is clearly Sheogorath. Since he's always interesting company, yes I would do it.
If I plant the fork in the center of the town, the entire town disappears and is transported to the Shivering Isles. You see, it is Sheogorath's dinner fork and he has devoured the town.
If I plant the cheese in the center of town, a massive cheese tree grows in a matter of days. At first the people are grateful for the free food, until they realize that they cannot eat the cheese fast enough. The cheese begins to rot on the tree and the smell is unbearable.
If I plant the staff in the center of town, all of the people in the the town are transformed into various animals, daedra, and intimate objects. Clearly, the staff was the Wabbajack.